Cited by 154Mobile Health and mHealth ApplicationsObesity, Physical Activity, DietPhysical Activity and Health

The Efficacy of a Technology‐based System in a Short‐term Behavioral Weight Loss Intervention

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Polzien, Kristen M., Jakicic, John M., Tate, Deborah F., Otto, Amy D.·2007·Obesity

Abstract

Objective: The objective was to examine the efficacy of adding a technology‐based program to an in‐person, behavioral weight loss intervention. Research Methods and Procedures: Fifty‐seven subjects (BMI = 33.1 ± 2.8 kg/m 2; age = 41.3 ± 8.7 years) participated in a 12‐week intervention with random assignment to Standard In‐Person Behavioral Weight Control Program (SBWP) or Intermittent or Continuous Technology‐Based Program (INT‐TECH, CON‐TECH). SBWP subjects received seven individualized weight loss sessions encouraging dietary and exercise modifications. INT‐TECH and CON‐TECH subjects received all SBWP components; additionally, these groups used a SenseWear Pro Armband (BodyMedia, Inc.) to monitor energy expenditure and an Internet‐based program to monitor eating behaviors. These features were used by INT‐TECH subjects during weeks 1, 5, and 9 and CON‐TECH subjects weekly throughout the intervention. Results: Intent‐to‐treat analysis revealed weight loss of 4.1 ± 2.8 kg, 3.4 ± 3.4 kg, and 6.2 ± 4.0 kg, for SBWP, INT‐TECH, and CON‐TECH groups, respectively (CON‐TECH > INT‐TECH, p ≤ 0.05). Discussion: These results indicate that the technology‐based program needs to be used continuously throughout the intervention period to significantly impact weight loss. Future studies should examine the long‐term and independent effect of this technology on weight loss, and for whom this intervention format is most effective.

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Crossref · 10.1038/oby.2007.584

Cites

17 of 17 references verified0 citation errors · 0 not checkable

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  • Two of the included studies reported a significant increase in daily steps, four reported a significant increase in MVPA, and two reported a significant increase in energy expenditure for the intervention group compared with control.

    “Two of the included studies [34,44] reported a significant increase in daily steps, 4 studies [30,34,36,53] reported a significant increase in MVPA, and 2 studies [45,47] reported a significant increase in energy expenditure for the intervention group compared with control.”

    From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [45]

    The relevant part of the citing sentence attributes an increase in energy expenditure relative to control to this study. In “Change in LTPA and Dietary Intake” (page unavailable), the paper reports that leisure-time physical activity, measured in kcal/week, increased within all three groups, but that differences between groups were not statistically significant. It therefore does not support the claimed significant intervention-versus-control increase. (LLM, conf=0.88)

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  • Blinding of outcome assessors (detection bias) was assessed as high risk for 7 studies [31,43,45-48,52] because of the use of subjective outcome measures.

    “Blinding of outcome assessors (detection bias) was assessed as high risk for 7 studies [31,43,45-48,52] because of the use of subjective outcome measures.”

    From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [45]

    The Assessments section (page unavailable) describes self-reported physical activity and questionnaire-based dietary intake, supporting the presence of subjective measures. It also says body weight was measured with a calibrated scale. The paper does not itself assess outcome-assessor blinding or classify the study as high risk of detection bias; that classification is the citing authors’ judgment. (LLM, conf=0.82)

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  • 4 studies reported low activity tracker wear time, with 1 study reporting that all participants had ceased wearing their activity tracker by the end of the intervention.

    “Furthermore, 4 studies [32,37,38,45] reported low activity tracker wear time, with 1 study [32] reporting that all participants had ceased wearing their activity tracker by the end of the intervention.”

    From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [45]

    The Analysis of Process Measures reports that armband time on body decreased during the intervention in the CON-TECH group, supporting a decline in wear time. Table 2 (shown under Discussion) reports nonzero wear time across weeks 9–12, but neither passage establishes that all participants had stopped wearing the tracker by the intervention’s end. This paper alone also cannot substantiate the count of four studies. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • 3 studies required participants to be proficient at using the internet and/or smartphones.

    “with 3 studies requiring participants to be proficient at using the internet and/or smartphones [21,22,45].”
  • 8 studies included more than 1 intervention group.

    “Overall, 8 studies included more than 1 intervention group [34,43,45-47,52-54].”

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Cites

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Research works printed but not linked: 3

  1. Short-Term Behavioral Weight Loss Intervention, Polzien et al. OBESITY Vol. 15 No. 4 April 2007 829
  2. 1930739x, 2007, 4, Downloaded from https://onlinelibrary.wiley.com/doi/10.1038/oby.2007.584, Wiley Online Library on [18/08/2026]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License
  3. Tate DF, Jackvony EH, Wing RR. Effects of internet be- havioral counseling on weight loss in adults at risk for type 2 diabetes. JAMA. 2003;289:1833-6.

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Authors
Polzien, K. M., Jakicic, J. M., Tate, D. F., & Otto, A. D.
Affiliations
  • University of Pittsburgh (US)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
Jakicic, John M.
Venue
Obesity
Publisher
Wiley
Published
2007-04
Volume
15
Issue
4
Pages
825-830
ISSN
  • 1930-7381 (ISSN-L)
  • 1930-739X
OpenAlex
W2072088591
Cited by
154
References
16
Citations by year
2026: 2 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 6 · 2020: 9 · 2019: 9 · 2018: 10 · 2017: 7 · 2016: 7 · 2015: 12 · 2014: 10 · 2013: 14 · 2012: 15
FWCI
18.36
Type
journal article
Language
en
Open access
Locations
  • Obesity (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Health Professions › General Health Professions › Mobile Health and mHealth Applications
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
Keywords
weight loss, behavioral weight control, technology-based interventions, dietary change, exercise modification, overweight adults
MeSH terms
Adolescent, Adult, Behavior Therapy, Body Weight, Diet, Reducing, Feeding Behavior, Female, Humans, Male, Middle Aged, Technology, Weight Loss, Exercise, Body Mass Index, Monitoring, Ambulatory, Internet

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