Cited by 134Sports Performance and TrainingMuscle metabolism and nutritionCardiovascular and exercise physiology

Enhanced Endurance Performance by Periodization of Carbohydrate Intake: “Sleep Low” Strategy

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MARQUET, LAURIE-ANNE, BRISSWALTER, JEANICK, LOUIS, JULIEN, TIOLLIER, EVE, BURKE, LOUISE M., HAWLEY, JOHN A., HAUSSWIRTH, CHRISTOPHE·2016·Medicine & Science in Sports & Exercise

Abstract

PURPOSE: We investigated the effect of a chronic dietary periodization strategy on endurance performance in trained athletes. METHODS: Twenty-one triathletes (V˙O2max: 58.7 ± 5.7 mL·min(-1)·kg(-1)) were divided into two groups: a "sleep-low" (SL) (n = 11) and a control (CON) group (n = 10) consumed the same daily carbohydrate (CHO) intake (6 g·kg(-1)·d(-1)) but with different timing over the day to manipulate CHO availability before and after training sessions. The SL strategy consisted of a 3-wk training-diet intervention comprising three blocks of diet-exercise manipulations: 1) "train-high" interval training sessions in the evening with high-CHO availability, 2) overnight CHO restriction ("sleeping-low"), and 3) "train-low" sessions with low endogenous and exogenous CHO availability. The CON group followed the same training program but with high CHO availability throughout training sessions (no CHO restriction overnight, training sessions with exogenous CHO provision). RESULTS: There was a significant improvement in delta efficiency during submaximal cycling for SL versus CON (CON, +1.4% ± 9.3%; SL, +11% ± 15%, P < 0.05). SL also improved supramaximal cycling to exhaustion at 150% of peak aerobic power (CON, +1.63% ± 12.4%; SL, +12.5% ± 19.0%; P = 0.06) and 10-km running performance (CON, -0.10% ± 2.03%; SL, -2.9% ± 2.15%; P < 0.05). Fat mass was decreased in SL (CON, -2.6 ± 7.4; SL, -8.5% ± 7.4% before; P < 0.01), but not lean mass (CON, -0.22 ± 1.0; SL, -0.16% ± 1.7% PRE). CONCLUSION: Short-term periodization of dietary CHO availability around selected training sessions promoted significant improvements in submaximal cycling economy, as well as supramaximal cycling capacity and 10-km running time in trained endurance athletes.

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Crossref · 10.1249/mss.0000000000000823

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  • 1-3 weeks of sleep-low training in elite triathletes and cyclists improves cycling efficiency (3.1%) compared with traditional train-high approaches.

    “Marquet et al. [40, 41] observed that 1–3 weeks of sleep-low training in elite triathletes and cyclists improves cycling efficiency (3.1%), 20 km cycling time-trial performance (3.2%) and 10 km running performance (2.9%) compared with traditional train-high approaches.”

    From Fuel for the Work Required: A Theoretical Framework for Carbohydrate Periodization and the Glycogen Threshold Hypothesis (2018) · cites this paper as [40]

    The Training protocol and Subjects sections describe a three-week intervention in endurance-trained triathletes, and the Discussion reports improved cycling efficiency only in the sleep-low group. The paper does not report a 3.1% improvement: its reported change in submaximal cycling delta efficiency is +11% in the sleep-low group versus +1.4% in controls. This source alone also does not establish the claim’s one-week duration or cyclist population. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • 1-3 weeks of sleep-low training in elite triathletes and cyclists improves 20 km cycling time-trial performance (3.2%) compared with traditional train-high approaches.

    “Marquet et al. [40, 41] observed that 1–3 weeks of sleep-low training in elite triathletes and cyclists improves cycling efficiency (3.1%), 20 km cycling time-trial performance (3.2%) and 10 km running performance (2.9%) compared with traditional train-high approaches.”

    From Fuel for the Work Required: A Theoretical Framework for Carbohydrate Periodization and the Glycogen Threshold Hypothesis (2018) · cites this paper as [40]

    The Introduction and Training protocol describe a three-week sleep-low intervention in endurance-trained triathletes, with a high-carbohydrate control group. The Simulation of triathlon race section describes fixed-intensity cycling followed by a 10 km running time trial—not a 20 km cycling time trial—and the reported improvement is in running performance. This paper therefore does not support the attributed 3.2% cycling time-trial improvement or the inclusion of cyclists as participants. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • 1-3 weeks of sleep-low training in elite triathletes and cyclists improves 10 km running performance (2.9%) compared with traditional train-high approaches.

    “Marquet et al. [40, 41] observed that 1–3 weeks of sleep-low training in elite triathletes and cyclists improves cycling efficiency (3.1%), 20 km cycling time-trial performance (3.2%) and 10 km running performance (2.9%) compared with traditional train-high approaches.”

    From Fuel for the Work Required: A Theoretical Framework for Carbohydrate Periodization and the Glycogen Threshold Hypothesis (2018) · cites this paper as [40]

    The 10 km running-performance results report a 2.9% improvement after the sleep-low intervention, versus no change in controls. The Subjects and Training protocol sections specify endurance-trained male triathletes and a three-week intervention; this paper does not establish the running result for a one-week intervention, elite athletes, or cyclists as a separate study population. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Studies demonstrating beneficial effects on cell signalling and performance adaptations have completely restricted CHO after the evening training session and after subjects were fed a protein-only meal or beverage.

    “However, it is noteworthy that studies demonstrating beneficial effects on cell signalling [38] and performance adaptations [40, 41] have completely restricted CHO after the evening training session and after subjects were fed a protein-only meal or beverage.”
  • Even in the absence of post-exercise CHO intake, glycogen synthesis occurs at rates of 1-2 mmol/kg wet weight of muscle/h through gluconeogenesis, or, particularly in the case of high-intensity exercise, lactate.

    “Indeed, even in the absence of post-exercise CHO intake, glycogen synthesis occurs at rates of 1-2 mmol/kg wet weight (w.w.) of muscle/h through gluconeogenesis (63), or, particularly in the case of high-intensity exercise, lactate (44).”

    From Postexercise muscle glycogen resynthesis in humans. (2017) · cites this paper as [63]

    The Introduction discusses withholding carbohydrate after exercise, and the Discussion discusses training with reduced glycogen, but neither gives a post-exercise glycogen-synthesis rate or identifies lactate as its source. Searches for glycogen resynthesis, lactate conversion, and the stated rate found no passage addressing that mechanism. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 2

  1. Burke LM, Cox GR, Culmmings NK, Desbrow B. Guidelines for daily carbohydrate intake: do athletes achieve them? Sports Med 2001;31(4):267-99.
  2. Nana A, Slater GJ, Hopkins WG, et al. Importance of Standardized DXA Protocol for Assessing Physique Changes in Athletes. Int J Sport Nutr Exerc Metab. In Press

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Authors
MARQUET, L.-A., BRISSWALTER, J., LOUIS, J., TIOLLIER, E., BURKE, L. M., HAWLEY, J. A., & HAUSSWIRTH, C.
Affiliations
Laboratoire Motricité Humaine Éducation Sport Santé (FR)
Venue
Medicine & Science in Sports & Exercise
Published
2016-04
Volume
48
Issue
4
Pages
663-672
ISSN
0195-9131 (ISSN-L)
OpenAlex
W2409908568
Cited by
134
References
36
Citations by year
2026: 4 · 2025: 7 · 2024: 11 · 2023: 5 · 2022: 10 · 2021: 14 · 2020: 19 · 2019: 20 · 2018: 23 · 2017: 11 · 2016: 10
FWCI
25.96
Type
journal article
Language
en
Open access
Locations
  • Medicine & Science in Sports & Exercise (publishedVersion)
  • PubMed (publishedVersion)
  • Liverpool John Moores University (acceptedVersion)
  • Research Bank (Australian Catholic University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
carbohydrate availability, endurance performance, triathletes, carbohydrate restriction, cycling economy, fat mass, trained athletes, interval training
MeSH terms
Adult, Bicycling, Body Composition, Diet, Dietary Carbohydrates, Exercise Test, Feeding Behavior, Humans, Male, Periodicity, Physical Endurance, Running, Athletes, Meals, Sports Nutritional Physiological Phenomena

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