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Cited by 9Physical Activity and HealthCardiovascular and exercise physiologyNutrition and Health in Aging

The Benefits of Exercise Training in Combination With Weight Loss Therapies

Open access
Jiang, Bryan C., Villareal, Dennis T.·2025·Diabetes
DOI 10.2337/dbi25-0001PMC PMC12418233
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Abstract

The primary treatment for obesity involves calorie restriction (CR) to promote dietary weight loss achieved through interventions including behavioral modification, bariatric surgery, and antiobesity medications. In adults with obesity, CR-induced weight loss enhances physical function and improves quality of life, while also reducing the burden of various obesity-related chronic conditions, including hypertension, diabetes, obstructive sleep apnea, and atherosclerotic heart disease. However, it is also associated with a decline in lean mass and bone mineral density, which increases the risk of sarcopenia and osteoporosis. When performed alongside CR, progressive resistance training (RT) attenuates this loss of lean mass and bone mass, while the addition of aerobic training (AT) further improves cardiorespiratory fitness. The individual benefits of RT and AT are complementary, and combining both exercise training modalities during CR provides the most optimal benefits for body composition and physical function. The World Health Organization recommends that adults engage in at least 150 min of moderate-intensity or 75 min of vigorous-intensity AT weekly and participate in RT activities involving major muscle groups at least 2 days per week. While this recommendation applies to the general adult population, regular exercise training that incorporates both RT and AT is particularly crucial for adults with obesity undergoing weight loss interventions. This clinical perspective highlights the benefits of exercise training alongside current weight loss strategies, such as lifestyle changes, bariatric surgery, and pharmacotherapy, with a focus on incretin-based therapies. Article Highlights: Weight loss achieved through calorie restriction causes a decline in lean mass and bone mineral density. Progressive resistance training stimulates muscle protein synthesis even during negative energy balance and is particularly crucial for mitigating the loss of lean mass associated with calorie restriction. Aerobic training further improves cardiorespiratory fitness during calorie restriction. Combining both exercise training modalities during calorie restriction provides the most optimal benefits for body composition and physical function.

Integrity signals

Registry

Crossref · 10.2337/dbi25-0001

Cites

57 of 59 references verified0 citation errors · 2 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

81 of 110 cited sources checked · 37 supported · 4 flagged · accuracy not yet measured

  • Interpretationcitation

    In the Lundgren et al. study, total weight loss was small because the trial assessed maintenance after initial weight reduction.

    “the overall weight loss was also minimal, since the study was focused on the weight-maintenance period following active weight loss.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [45] Lundgren, 2021, Healthy weight loss maintenance with exercise, liraglutide, or both combined, N Engl J Med source

      The trial did assess maintenance after an initial low-calorie diet, but the Body Weight and Body-Fat Percentage section reports total weight losses of 15.7%, 10.9%, and 13.4% in the active-treatment groups. The Discussion describes the combination group's approximately 16% total loss as greater than losses in several comparator programs. The claim appears to confuse modest additional loss during maintenance with total loss across the study. (LLM, conf=0.88)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation

    In the Lundgren et al. trial, cardiorespiratory fitness improved over 1 year only in the group that received both exercise and liraglutide.

    “Only those in the combined therapy group showed sustained improvements in glycated hemoglobin levels, insulin sensitivity, and cardiorespiratory fitness at the 1-year follow-up in the trial.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [45] Lundgren, 2021, Healthy weight loss maintenance with exercise, liraglutide, or both combined, N Engl J Med source

      The Metabolic Health-Related End Points section says that both the exercise group and the combination group had increased cardiorespiratory fitness; the Discussion repeats this finding. The RESULTS summary says only the combination strategy improved all three listed measures together, not that fitness improved only with combination therapy. (LLM, conf=0.90)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation

    In the Lundgren et al. trial, glycated hemoglobin improved over 1 year only in the group that received both exercise and liraglutide.

    “Only those in the combined therapy group showed sustained improvements in glycated hemoglobin levels, insulin sensitivity, and cardiorespiratory fitness at the 1-year follow-up in the trial.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [45] Lundgren, 2021, Healthy weight loss maintenance with exercise, liraglutide, or both combined, N Engl J Med source

      The Metabolic Health-Related End Points section reports that both liraglutide alone and the combination reduced glycated hemoglobin at 1 year. The Discussion likewise says both groups had further reductions. Thus, the improvement was not limited to the combination group, although the paper reports that only the combination improved insulin sensitivity. (LLM, conf=0.90)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation

    In the combination group of the Lundgren et al. secondary analysis, weight loss was 19.5 kg.

    “even with a significant weight loss of 19.5 kg (48).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [48] Jensen, 2024, Bone health after exercise alone, GLP-1 receptor agonist treatment, or combination treatment: a secondary analysis of a randomized clinical trial, JAMA Netw Open source

      The Results (Body Weight and Body Composition; page unavailable) report a mean weight loss of 16.88 kg in the combination group, not 19.5 kg. The cited 19.54 kg is the upper bound of the 95% confidence interval, not the reported mean loss. (LLM, conf=0.91)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation
    § The Benefits of Exercise Training in Combination With Weight Loss Therapies

    Progressive resistance training during calorie restriction reduces bone mineral density loss.

    “When performed alongside CR, progressive resistance training (RT) attenuates this loss of lean mass and bone mass, while the addition of aerobic training (AT) further improves cardiorespiratory fitness.”
    • Also stated in: § LIFESTYLE INTERVENTIONS · plain
      “the preservation of skeletal muscle by RT during CR mitigates the loss of BMD at the total hip, assessed with DXA (10).”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [10] Jiang, 2019, Weight loss-induced reduction of bone mineral density in older adults with obesity, J Nutr Gerontol Geriatr source
    • cites [19] Klein-Nulend, 2013, Mechanosensation and transduction in osteocytes, Bone source
  • Not yet classified. 2
  • May combine two claims. 28
  • Classified as probably not a substantial claim. 7

  • Not yet classified.

    Premise

    Weight loss interventions are associated with loss of lean body mass and bone mineral density.

    “concerns persist about the loss of lean body mass and bone mineral density (BMD) associated with weight loss interventions (9,10).”
    Quote in the paperNot yet classified2 of 2 sources checked
    • cites [9] Batsis, 2017, Weight loss interventions in older adults with obesity: a systematic review of randomized controlled trials since 2005, J Am Geriatr Soc source
    • cites [10] Jiang, 2019, Weight loss-induced reduction of bone mineral density in older adults with obesity, J Nutr Gerontol Geriatr source

  • May combine two claims.

    Premisecitation
    § The Benefits of Exercise Training in Combination With Weight Loss Therapies

    Obesity reduces quality of life and life expectancy.

    “It has also been shown to reduce both quality of life and life expectancy (2).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [2] Klein, 2022, Why does obesity cause diabetes?, Cell Metab source

      The Introduction describes obesity-related metabolic disease, but does not address quality of life or life expectancy. Its discussion of survival during starvation concerns fasting, not life expectancy; searches for both claimed outcomes found no supporting passage in our copy. (LLM, conf=0.75)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Interpretationcitation
    § The Benefits of Exercise Training in Combination With Weight Loss Therapies

    Resistance training and aerobic training have complementary benefits, and combining both during calorie restriction gives the best body composition and physical function outcomes.

    “The individual benefits of RT and AT are complementary, and combining both exercise training modalities during CR provides the most optimal benefits for body composition and physical function.”
    • Also stated in: § LIFESTYLE INTERVENTIONS · boosted
      “the simultaneous incorporation of both exercise types, known as combination training (CT), yields the most significant advantages for functional improvement and preservation of lean mass (22) (Fig. 1).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [22] Villareal, 2017, Aerobic or resistance exercise, or both, in dieting obese older adults, N Engl J Med source

      The Discussion reports complementary effects of aerobic and resistance training and the greatest improvement in physical function with combined training during weight loss in obese older adults. But the Results (Body Composition; Bone Mineral Density, pages not available) do not establish that the combination produced the best body-composition outcomes: resistance training alone preserved more lean mass and better prevented hip bone-density loss. (LLM, conf=0.89)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    A retrospective analysis found that Roux-en-Y gastric bypass was linked to increased risk of falls and fractures that escalated over time, and these risks were unrelated to amount of weight lost or presence of calcium and vitamin D supplementation.

    “investigators found not only that RYGB was linked to an increased risk of falls and fractures that escalated over time but also that these risks were unrelated to the amount of weight lost or the presence of calcium and vitamin D supplementation (36).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [36] Axelsson, 2018, Fracture risk after gastric bypass surgery: a retrospective cohort study, J Bone Miner Res source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The benefits of lifestyle intervention for obesity-related chronic diseases are well recognized and outlined in multiple societal guidelines.

    “The benefits of lifestyle intervention, an essential treatment for obesity-related chronic diseases, are well recognized, and their role is clearly outlined in multiple societal guidelines (4,13,20).”
    Quote in the paperNot a substantial claim3 of 3 sources checked
    • cites [4] Jensen, 2014, 2013 AHA/ACC/TOS guideline for the management of overweight and obesity in adults: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and The Obesity Society, J Am Coll Cardiol source
    • cites [13] Izquierdo, 2025, Global consensus on optimal exercise recommendations for enhancing healthy longevity in older adults (ICFSR), J Nutr Health Aging source

      In “Role of exercise in the secondary and tertiary disease prevention” (page unavailable), the paper says multiple consensus and position statements recommend exercise for people with type 2 diabetes and describes benefits relevant to obesity. It also reports benefits of diet-and-exercise intervention for diabetes prevention in high-risk obese adults. These passages do not establish that lifestyle intervention broadly is an essential treatment for obesity-related chronic diseases or that this broader role is outlined in multiple societal guidelines. (LLM, conf=0.82)

      Experimental — accuracy not yet measured
    • cites [20] Arnett, 2019, 2019 ACC/AHA guideline on the primary prevention of cardiovascular disease: a report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines, Circulation source

  • May combine two claims.

    Premisecitation

    Basal metabolic rate, the primary source of total energy expenditure, is primarily influenced by lean mass, so calorie restriction becomes increasingly difficult to sustain as lean mass diminishes.

    “Since the basal metabolic rate, the primary source of total energy expenditure, is primarily influenced by lean mass, CR becomes increasingly difficult to sustain as lean mass diminishes (29)”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [29] Sabounchi, 2013, Best-fitting prediction equations for basal metabolic rate: informing obesity interventions in diverse populations, Int J Obes (Lond) source

      The Introduction identifies BMR as the largest contributor to energy expenditure, and Results (‘Impact of Body Composition’) identifies fat-free mass as the best independent predictor of BMR. The paper does not establish that declining lean mass makes calorie restriction increasingly difficult to sustain; Methods (‘Overview’) says its analysis focuses on cross-sectional data rather than changes within individuals over time. Page numbers were unavailable in our copy. (LLM, conf=0.88)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    In that trial, cardiorespiratory fitness improved in all groups, but improvements in aerobic training (18%) and combination training (17%) were significantly greater than in resistance training (8%).

    “although cardiorespiratory fitness improved across all groups, the improvement seen in AT (18%) and CT (17%) groups was significantly more than in RT (8%).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [22] Villareal, 2017, Aerobic or resistance exercise, or both, in dieting obese older adults, N Engl J Med source

  • May combine two claims.

    Premisecitation

    In a 1-year randomized controlled trial of older adults with obesity, calorie restriction producing average total weight loss of 10% improved modified Physical Performance Test scores by 12%, while combining calorie restriction with regular exercise training led to a 21% improvement compared with placebo.

    “CR resulting in an average total weight loss of 10% improved physical function as assessed with modified Physical Performance Test (PPT) by 12%; however, combining CR with regular exercise training led to a 21% improvement in PPT scores in comparison with placebo.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [17] Villareal, 2011, Weight loss, exercise, or both and physical function in obese older adults, N Engl J Med source

      The Abstract Results report 10% weight loss and a 12% increase from baseline in Physical Performance Test scores in the diet group, and a 21% increase from baseline in the diet–exercise group. The 21% figure is not an improvement relative to placebo: the comparator was a control group, whose score increased by 1%. (LLM, conf=0.90)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Bariatric surgery can improve relative cardiorespiratory fitness through weight loss, but bariatric surgery alone does not lead to improvements in absolute cardiorespiratory fitness.

    “While bariatric surgery can improve relative cardiorespiratory fitness through weight loss, bariatric surgery alone does not lead to improvements in absolute cardiorespiratory fitness, highlighting the importance of AT (38).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [38] Zhou, 2022, Lean mass loss and altered muscular aerobic capacity after bariatric surgery, Obes Facts source

  • May combine two claims.

    Premisecitation

    In that trial, adding exercise training to calorie restriction reduced lean mass loss from 5% to 3% and hip bone mineral density decline from 3% to 1%.

    “the addition of exercise training to CR reduced the loss of lean mass from 5% to 3% and decline in BMD at the hip from 3% to 1% (17).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [17] Villareal, 2011, Weight loss, exercise, or both and physical function in obese older adults, N Engl J Med source

  • May combine two claims.

    Premisecitation

    In that trial, one-repetition maximum muscle strength increased similarly in resistance training (17%) and combination training (17%), while it was only maintained in aerobic training.

    “Muscle strength assessed according to an individual's one-repetition maximum (referred to as one-rep max or 1RM) also increased similarly in RT (17%) and CT (17%), while it was only maintained in AT.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [22] Villareal, 2017, Aerobic or resistance exercise, or both, in dieting obese older adults, N Engl J Med source

      The Results section (Strength, Balance, Gait, and Quality of Life; page not supplied) reports that one-repetition maximum strength rose in the resistance and combination groups and was maintained in the aerobic group. The reported increases were 19% and 18%, respectively, not 17% in both groups. (LLM, conf=0.92)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Resistance training stimulates muscle protein synthesis during negative energy balance, promoting myogenesis, and is crucial for mitigating muscle mass loss associated with calorie restriction in adults with obesity.

    “RT stimulates muscle protein synthesis even during negative energy balance, promoting myogenesis, and is particularly crucial to mitigating the loss of muscle mass associated with CR in this population (18).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [18] Colleluori, 2019, Aerobic plus resistance exercise in obese older adults improves muscle protein synthesis and preserves myocellular quality despite weight loss, Cell Metab source

      The Results section ('MPS rate in response to feeding improved most in COMB and REX groups'; page unavailable) reports increased meal-stimulated muscle protein synthesis during calorie-restriction-induced weight loss and says resistance exercise is particularly important for preserving lean mass in obese older adults. The Results section on myogenesis regulators reports that MEF2A expression was preserved with resistance or combined exercise, not that resistance training promoted myogenesis itself. The study also did not include a weight-loss-only group, limiting what it can establish about exercise versus calorie restriction alone. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    In that trial, hip bone mineral density decreased in all groups, but the decline was less with resistance training (-0.5%) and combination training (-1%) than with aerobic training (-3%).

    “Although BMD at the hip decreased across all intervention groups, the decline was less pronounced with RT (À0.5%) and CT (À1%) than with AT (À3%).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [22] Villareal, 2017, Aerobic or resistance exercise, or both, in dieting obese older adults, N Engl J Med source

  • May combine two claims.

    Interpretationcitation

    These findings indicate complementary effects of resistance and aerobic training on physical function without interference effects from concurrent training.

    “Overall, these findings indicate complementary effects of RT and AT on physical function without interference effects from concurrent training.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [22] Villareal, 2017, Aerobic or resistance exercise, or both, in dieting obese older adults, N Engl J Med source

  • May combine two claims.

    Premisecitation

    Aerobic training plays a vital role in enhancing cardiorespiratory fitness after bariatric surgery, which is closely linked to reduced risk of cardiovascular and all-cause mortality.

    “AT plays a vital role in enhancing cardiorespiratory fitness postsurgery, which is closely linked to a reduced risk of cardiovascular and all-cause mortality (20).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [20] Arnett, 2019, 2019 ACC/AHA guideline on the primary prevention of cardiovascular disease: a report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines, Circulation source

      Section 3.2 (Exercise and Physical Activity; page unavailable) links greater physical activity with fewer ASCVD events and deaths and recommends aerobic activity to lower ASCVD risk. It does not establish that aerobic training improves cardiorespiratory fitness after bariatric surgery or that postsurgical fitness is linked to reduced cardiovascular and all-cause mortality. Section 4.1 mentions bariatric surgery for weight loss, not those exercise outcomes. (LLM, conf=0.83)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Exercise training that incorporates both aerobic and progressive resistance training improves body composition, physical function, strength, and quality of life for adults with obesity.

    “Exercise training that incorporates aspects of both aerobic training (AT) and progressive resistance training (RT) has positive effects on body composition, improves physical function, boosts strength, and improves quality of life for adults with obesity (13).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [13] Izquierdo, 2025, Global consensus on optimal exercise recommendations for enhancing healthy longevity in older adults (ICFSR), J Nutr Health Aging source

      In “Adipose tissue and physical exercise” (page unavailable), the paper reports body-composition benefits from resistance and aerobic exercise, including reduced trunk fat with combined training in older men. “Sequencing resistance and aerobic training” (page unavailable) reports strength and functional benefits from combined training in older adults. These passages do not establish all four claimed outcomes—including quality of life—for adults with obesity specifically; the paper’s relevant evidence is framed around older adults and narrower study groups. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Tirzepatide and retatrutide induce even greater weight loss, 20.9% over 72 weeks and 24.2% over 48 weeks, respectively.

    “tirzepatide and retatrutide induce even greater degrees of weight loss, at 20.9% over 72 weeks and 24.2% over 48 weeks, respectively (43).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [43] Locatelli, 2024, Incretin-based weight loss pharmacotherapy: can resistance exercise optimize changes in body composition?, Diabetes Care source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Only 17% of adults in the general population follow the World Health Organization physical activity guidelines.

    “adherence to the World Health Organization recommendations for adults in the general population remains notably low at just 17% (51).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [51] Garcia-Hermoso, 2023, Adherence to aerobic and muscle-strengthening activities guidelines: a systematic review and meta-analysis of 3.3 million participants across 32 countries, Br J Sports Med source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Numerous countries have adopted policies to encourage physical activity and address increasing obesity.

    “many nations are now implementing policies aimed at promoting health-enhancing physical activity to combat rising obesity rates (13).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [13] Izquierdo, 2025, Global consensus on optimal exercise recommendations for enhancing healthy longevity in older adults (ICFSR), J Nutr Health Aging source

      The ‘Physical activity and exercise: global health recommendations’ section (page unavailable) discusses strategies to increase physical activity and identifies exercise as a measure against obesity. The ‘Implementation science’ section (page unavailable) discusses a role for policymakers, but neither section says that many nations are now implementing policies to combat rising obesity rates. (LLM, conf=0.78)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Older adults are at risk of worsening age-related sarcopenia and osteoporosis and were largely underrepresented in landmark incretin clinical trials.

    “This is especially true for older adults, who are at risk of worsening age-related sarcopenia and osteoporosis and were largely underrepresented in the study populations for these landmark clinical trials (44).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [44] Batsis, 2024, Should the incretin hype be the same for older adults: promise + cautions, J Am Geriatr Soc source

  • May combine two claims.

    Premisecitation

    Despite inducing less weight loss than tirzepatide, semaglutide resulted in a more significant loss of lean mass, 6.9 kg, or 13.9%, over 68 weeks.

    “Despite inducing a smaller magnitude of weight loss than tirzepatide, treatment with semaglutide resulted in an even more significant loss of lean mass, of 6.9 kg, or 13.9%, over its 68-week trial period (42).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [42] Wilding, 2021, Once-weekly semaglutide in adults with overweight or obesity, N Engl J Med source

      The Change in Body Composition section reports that lean body mass decreased in absolute terms in the DXA subpopulation, and the Change in Body Weight section reports outcomes at week 68. Our copy does not give a lean-mass loss of 6.9 kg or 13.9%, or compare semaglutide with tirzepatide. (LLM, conf=0.88)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Some incretin therapies, such as semaglutide, have additional benefits for obesity-related chronic diseases, including reductions in cardiovascular mortality and slowing progression of diabetic kidney disease.

    “In the case of some incretin therapies, such as semaglutide, additional benefits have also been demonstrated for obesityrelated chronic diseases, including reductions in cardiovascular mortality and slowing the progression of diabetic kidney disease (41).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [41] Pi-Sunyer, 2015, A randomized, controlled trial of 3.0 mg of liraglutide in weight management, N Engl J Med source

      The Discussion (p. 11) reports improved cardiometabolic risk factors with liraglutide, not the claimed outcomes with semaglutide. The Side Effects and Adverse Events section (p. 10) records one cardiovascular death in each treatment group. No passage found in searches for semaglutide, cardiovascular mortality, or kidney-disease progression supports the attributed claim. (LLM, conf=0.78)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    U.S. Medicare pays for intensive behavioral obesity therapy and for gym memberships in eligible patients.

    “in the U.S., Medicare already covers intensive behavioral therapy for obesity and reimburses gym membership fees for eligible patients (52).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [52] Ozoor, 2023, Primary care provider uptake of intensive behavioral therapy for obesity in Medicare patients, 2013-2019, PLoS One source

      The Introduction states that Medicare beneficiaries with obesity are eligible for intensive behavioral therapy and that providers can bill Medicare for it. The paper does not state that Medicare reimburses gym membership fees; its reimbursement discussion concerns therapy visits. No page numbers are available in our copy. (LLM, conf=0.88)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Some patients undergoing bariatric surgery may experience remission of diabetes.

    “Some patients undergoing bariatric surgery may even experience potential remission of diabetes (7).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [7] Courcoulas, 2023, Long term outcomes of metabolic/bariatric surgery in adults, BMJ source

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The World Health Organization recommends at least 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity aerobic training weekly and resistance training for major muscle groups at least 2 days per week.

    “The World Health Organization recommends that adults engage in at least 150 min of moderate-intensity or 75 min of vigorous-intensity AT per week in addition to participating in RT activities involving major muscle groups at least 2 days per week (14).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [14] World Health Organization, 2020, WHO Guidelines on Physical Activity and Sedentary Behavior

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Long-term complications of bariatric surgery include loss of lean mass and bone mineral density, nutritional deficiencies, and osteoporosis, particularly prevalent in surgeries that bypass the duodenum such as Roux-en-Y gastric bypass.

    “These include the loss of lean mass and BMD, as well as procedurespecific complications like nutritional deficiencies and osteoporosis, which are particularly prevalent in the case of surgeries that bypass the duodenum (i.e., RYGB) (7).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [7] Courcoulas, 2023, Long term outcomes of metabolic/bariatric surgery in adults, BMJ source

  • May combine two claims.

    Premisecitation

    Eligible patients who undergo bariatric surgery experience decreased all-cause and cardiovascular mortality and lower incidence of heart failure, myocardial infarction, and stroke.

    “Eligible patients who undergo bariatric surgery experience decreased all-cause and cardiovascular mortality, along with a lower incidence of heart failure, myocardial infarction, and stroke (7).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [7] Courcoulas, 2023, Long term outcomes of metabolic/bariatric surgery in adults, BMJ source

  • May combine two claims.

    Interpretationcitation

    The number of bariatric surgeries is rising but is outpaced by growing obesity rates, creating substantial and ever-increasing demand for effective antiobesity medications.

    “While the number of bariatric surgeries performed continues to rise, it is significantly outpaced by the growing obesity rates in the general population (1); thus, there is a substantial and everincreasing demand for effective antiobesity medications.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [1] World Health Organization . Obesity and Overweight, 2024. Accessed 16 March 2025. Available from https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Since 1991, significant data have accrued suggesting that bariatric surgery procedures are safe and effective, even for older adults.

    “Since 1991, when global guidelines for bariatric surgery were established, significant data have accrued suggesting that these procedures are safe and effective, even for older adults (31).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [31] Casillas, 2017, Comparative effectiveness of sleeve gastrectomy versus Roux-en-Y gastric bypass for weight loss and safety outcomes in older adults, Surg Obes Relat Dis source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    Mitigating loss of lean mass associated with weight loss interventions will become increasingly important as the worldwide population of adults aged 65 years is expected to double within 30 years.

    “Considering that the worldwide population of adults aged $65 years is expected to double within the next 30 years (12), mitigating the loss of lean mass associated with weight loss interventions will become increasingly important.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [12] United Nations Department of Economic and Social Affairs Population Division., World Population Prospects: The 2017 Revision: Key Findings and Advance Tables

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Not yet classified.

    Premise

    A meta-analysis revealed a sustained decline in fat-free mass within the first year following bariatric procedures, with no evidence that this loss plateaus.

    “a meta-analysis did reveal a sustained decline in fat-free mass within the first year following these procedures, with no evidence indicating that this loss plateaus (35).”
    Quote in the paperNot yet classified0 of 1 sources checked
    • cites [35] Haghighat, 2022, Preservation of fat-free mass in the first year after bariatric surgery: a systematic review and meta-analysis of 122 studies and 10,758 participants, Surg Obes Relat Dis source

  • May combine two claims.

    Premisecitation

    In postmenopausal women, a 5-month lifestyle intervention led to an average loss of 0.26 kg lean mass per 1-kg loss of fat mass; during the 12-month postintervention period, only 0.12 kg lean mass was recovered per 1 kg fat mass regained.

    “a 5-month period of lifestyle intervention led to an average loss of 0.26 kg lean mass per every 1-kg loss of fat mass; however, during the 12-month postintervention period, only 0.12 kg lean mass was recovered for every 1 kg fat mass regained (27).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [27] Beavers, 2011, Is lost lean mass from intentional weight loss recovered during weight regain in postmenopausal women?, Am J Clin Nutr source

  • May combine two claims.

    Premisecitation

    Lifestyle interventions focused on regular exercise and calorie-restricted diet remain first-line treatment for most adults with obesity, but limitations include poor adherence and low sustainability in actual clinical practice.

    “Although lifestyle interventions focused on regular exercise and adherence to a calorie-restricted diet remain the first-line treatment for most adults struggling with obesity, limitations include poor adherence and low sustainability rates among many adults in actual clinical practice (23).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [23] Machado, 2022, Understanding weight regain after a nutritional weight loss intervention: systematic review and meta-analysis, Clin Nutr ESPEN source

  • May combine two claims.

    Premisecitation

    Exercise training after bariatric surgery does not result in additional weight loss but effectively preserves lean mass, increases fat mass loss, and reduces waist circumference.

    “While engaging in exercise training after bariatric surgery does not result in additional weight loss, it effectively preserves lean mass, increases fat mass loss, and reduces waist circumference (37).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [37] Li, 2025, Effects of exercise training on body composition and exercise capacity after bariatric surgery: a systematic review and meta-analysis, Am Surg source

  • May combine two claims.

    Premisecitation

    Exercise training reduces the loss of lean mass and bone mineral density in patients after bariatric surgery.

    “and those following bariatric surgery (37)”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [37] Li, 2025, Effects of exercise training on body composition and exercise capacity after bariatric surgery: a systematic review and meta-analysis, Am Surg source
35 of 35

  • The paper relies on this without support.

    Exercise training without calorie restriction does not produce significant weight loss.

    “While exercise training alone in the absence of calorie restriction (CR) has not been shown to result in significant weight loss, the addition of exercise training to CR-induced weight loss attenuates the decline in lean mass and BMD when adequate protein and micronutrient intake is ensured (6,8).”

  • The paper relies on this without support.

    As of the review, no randomized trial has tested whether single or combined exercise modes affect body composition or physical function in adults with obesity who are losing weight during incretin treatment.

    “Thus far, no RCTs have included examination of the impact of individual or combined exercise training modalities on body composition and physical function in adults with obesity who are actively losing weight while receiving incretin therapy.”

  • The paper relies on this without support.

    The mechanisms by which exercise preserves lean mass and bone mineral density during caloric restriction or after bariatric surgery are sufficiently similar to those during incretin-induced weight loss that the same benefits can be expected.

    “Given the established benefits of exercise training in reducing the loss of lean mass and BMD in patients undergoing CR-induced weight loss through behavioral modification (8) and those following bariatric surgery (37), RT, in particular, is poised to play a similarly vital role for patients losing weight on incretin therapy (43).”

  • The paper relies on this without support.

    Incretin therapies are associated with unintended loss of muscle and bone mass.

    “mitigating the unintended loss of muscle and bone mass associated with these treatments”

  • The paper relies on this without support.

    Evidence is scarce on the best exercise approaches to reduce long-term harm to lean mass from incretin drugs while improving cardiorespiratory health.

    “Given the current dearth of available evidence, further research is needed to determine the optimal exercise training strategies for mitigating the adverse long-term effects of incretin therapies on lean body mass while maximizing the benefits to cardiorespiratory health.”

  • The paper relies on this without support.

    Sex differences in exercise response, circadian timing of exercise, and the best protein intake to combine with training are still under-researched.

    “Additional factors, such as sex differences in exercise responses, the timing of exercise in relation to circadian rhythms, and the optimal protein intake to pair with exercise training, remain understudied currently.”
6 of 6

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Combination training did not preserve lean mass best

    Minor

    The paper says combination training offers the greatest advantage for preserving lean mass, but its reported trial results show a 3% loss with combination training versus a smaller 2% loss with resistance training alone.

  • Physical-activity guideline cites a different reference

    Minor

    The text cites reference 14 for the World Health Organization's physical-activity recommendation, but reference 14 is a study of exercise and mobility disability. The WHO physical-activity guidelines appear under reference 13.

2 of 2

Cites

Flagged first, then by citations

2 of the 52 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Related

Authors
Jiang, B. C., & Villareal, D. T.
Affiliations
  • Baylor College of Medicine (US)
  • Michael E. DeBakey VA Medical Center (US)
Corresponding author
Villareal, Dennis T.
ORCID
Villareal, Dennis T.
Venue
Diabetes
Publisher
American Diabetes Association
Published
2025-07-08
Volume
74
Issue
12
Pages
2199-2206
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
DOI
10.2337/dbi25-0001
PMC
PMC12418233
OpenAlex
W4412105776
Semantic Scholar
d640ce06435d7482784192e448f2e44d7f6fed5a
Cited by
9
References
52
Citations by year
2026: 6 · 2025: 3
FWCI
1.17
Type
journal article
Language
en
Open access
Licence
www.diabetesjournals.org/journals/pages/license (vor)
Locations
  • Diabetes (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion)
  • Digital Commons-TMC (Texas Medical Center) (submittedVersion)
Funders
  • Clinical Science Research and Development (I01-CX002161)
  • Division of Diabetes, Endocrinology, and Metabolic Diseases (R01-DK109950)
Topics
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
Keywords
obesity, caloric restriction, weight loss, exercise training, resistance training, aerobic exercise, lean mass loss, bone mineral density, sarcopenia, osteoporosis, muscle protein synthesis, cardiorespiratory fitness, body composition, physical function, incretin-based therapy, bariatric surgery, anti-obesity drugs, lifestyle modification
MeSH terms
Body Composition, Combined Modality Therapy, Exercise Therapy, Humans, Obesity, Weight Loss, Exercise, Bone Density, Caloric Restriction, Bariatric Surgery, Resistance Training

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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-09-28.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-09-28.

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