Cited by 985Muscle metabolism and nutritionSports Performance and TrainingCardiovascular and exercise physiology

Carbohydrates for training and competition

Open access
Burke, Louise M., Hawley, John A., Wong, Stephen H. S., Jeukendrup, Asker E.·2011·Journal of Sports Sciences

Abstract

An athlete's carbohydrate intake can be judged by whether total daily intake and the timing of consumption in relation to exercise maintain adequate carbohydrate substrate for the muscle and central nervous system ("high carbohydrate availability") or whether carbohydrate fuel sources are limiting for the daily exercise programme ("low carbohydrate availability"). Carbohydrate availability is increased by consuming carbohydrate in the hours or days prior to the session, intake during exercise, and refuelling during recovery between sessions. This is important for the competition setting or for high-intensity training where optimal performance is desired. Carbohydrate intake during exercise should be scaled according to the characteristics of the event. During sustained high-intensity sports lasting ~1 h, small amounts of carbohydrate, including even mouth-rinsing, enhance performance via central nervous system effects. While 30-60 g · h(-1) is an appropriate target for sports of longer duration, events >2.5 h may benefit from higher intakes of up to 90 g · h(-1). Products containing special blends of different carbohydrates may maximize absorption of carbohydrate at such high rates. In real life, athletes undertake training sessions with varying carbohydrate availability. Whether implementing additional "train-low" strategies to increase the training adaptation leads to enhanced performance in well-trained individuals is unclear.

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Registry

Crossref · 10.1080/02640414.2011.585473

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  • Athletes involved in moderate and high-volume training need greater amounts of carbohydrate and protein in their diet to meet macronutrient needs.

    “However, athletes involved in moderate and high-volume training need greater amounts of carbohydrate and protein (discussed later) in their diet to meet macronutrient needs [50].”

    From ISSN exercise & sports nutrition review update: research & recommendations (2018) · cites this paper as [50]

    Table II in “Acute strategies to promote high carbohydrate availability for exercise” gives higher daily carbohydrate targets for moderate and high training loads. The “Well supported principles” section discusses adding protein when carbohydrate intake is insufficient for refuelling, but does not say that moderate- or high-volume training requires greater protein intake. Page numbers were not provided. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Athletes involved in high volume intense training may need to consume 8-10 g/day of carbohydrate (400-1500 g/day for 50-150 kg athletes) in order to maintain muscle glycogen levels.

    “Research has also shown that athletes involved in high volume intense training (e.g., 3–6 h per day of intense training in 1–2 daily workouts for 5–6 days per week) may need to consume 8–10 g/day of carbohydrate (i.e., 400–1500 g/day for 50–150 kg athletes) in order to maintain muscle glycogen levels [50].”

    From ISSN exercise & sports nutrition review update: research & recommendations (2018) · cites this paper as [50]

    Table II (page unavailable) recommends 6–10 g/kg/day for 1–3 hours of moderate-to-high-intensity exercise and 8–12 g/kg/day for more than 4–5 hours; the Well supported principles section links daily carbohydrate intake to glycogen restoration. The citing sentence omits “per kg” from its 8–10 g/day figure, and the paper does not specify its 1–2 workouts on 5–6 days per week schedule. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Athletes involved in moderate amounts of intense training typically need to consume 5-8 g/kg/day or 250-1200 g/day for 50-150 kg athletes of carbohydrate to maintain liver and muscle glycogen stores.

    “In terms of carbohydrate needs, athletes involved in moderate amounts of intense training (e.g., 2–3 h per day of intense exercise performed 5–6 times per week) typically need to consume a diet consisting of 5–8 g/kg/day or 250–1200 g/day for 50–150 kg athletes of carbohydrate to maintain liver and muscle glycogen stores [23, 24, 50].”

    From ISSN exercise & sports nutrition review update: research & recommendations (2018) · cites this paper as [50]

    Table II (Acute strategies to promote high carbohydrate availability for exercise; page unavailable) recommends daily carbohydrate intake based on exercise load, and the Well supported principles section links that intake to glycogen restoration. But for moderate-to-high-intensity exercise lasting 1–3 hours per day, Table II recommends 6–10 g/kg/day, not 5–8 g/kg/day. The paper also does not give the stated 250–1200 g/day range or specify training 5–6 times per week. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Complete replenishment of muscle glycogen stores typically unfolds over a 24-36 h period post-exercise, provided that 7-12 g·kg−1 carbohydrate are consumed per day.

    “Complete replenishment of muscle glycogen stores typically unfolds over a 24–36 h period post-exercise, provided that 7–12 g·kg−1 carbohydrate are consumed per day [15–18].”

    From Nutritional Strategies to Improve Post-exercise Recovery and Subsequent Exercise Performance: A Narrative Review (2025) · cites this paper as [15]

    In “Acute strategies to promote high carbohydrate availability for exercise” (page unavailable), the paper says glycogen stores can normalize within 24 hours with reduced training and adequate fuel, and that high glycogen concentrations can be achieved with 24–36 hours of high carbohydrate intake and rest. Table II gives 7–12 g/kg per 24 hours for general fuelling, but does not establish that this entire intake range typically produces complete post-exercise replenishment in 24–36 hours. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Carbohydrate availability during exercise is ergogenic as CHO feeding can help maintain plasma glucose and prevent hypoglycemia, spare hepatic glycogen, and delay muscle glycogen depletion.

    “It is well documented that carbohydrate availability during exercise is ergogenic as CHO feeding can help maintain plasma glucose and prevent hypoglycemia, spare hepatic glycogen, and delay muscle glycogen depletion [195–198].”

    From International society of sports nutrition position stand: nutritional concerns of the female athlete (2023) · cites this paper as [195]

    The “Carbohydrate intake during exercise” section (page not provided) says carbohydrate feeding can enhance performance, prevent low blood glucose, and spare muscle glycogen, supporting much of the claim. It does not say that feeding spares hepatic glycogen; the passages found on glycogen do not establish that mechanism. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Cites

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Research works printed but not linked: 2

  1. [12]12. Burke, L. M. (2010b). Nutrition for recovery after competition and training. In L. M. Burke & V. Deakin (Eds.), Clinical sports nutrition (4th edn., pp. 358-392). Sydney, NSW: McGraw-Hill.
  2. [46]46. Jeukendrup, A. E. (2011). Endurane sports: Marathon, triathlon, road cycling. Forthcoming in Journal of Sports Sciences.

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Authors
Burke, L. M., Hawley, J. A., Wong, S. H. S., & Jeukendrup, A. E.
Affiliations
  • Australian Sports Commission (AU)
  • RMIT University (AU)
  • Chinese University of Hong Kong (HK)
  • University of Birmingham (GB)
Corresponding author
Burke, Louise M.
Venue
Journal of Sports Sciences
Published
2011-01
Volume
29
Issue
sup1
Pages
S17-S27
ISSN
  • 0264-0414 (ISSN-L)
  • 1466-447X
OpenAlex
W2102043517
Cited by
985
References
80
Citations by year
2026: 75 · 2025: 85 · 2024: 73 · 2023: 89 · 2022: 75 · 2021: 86 · 2020: 80 · 2019: 72 · 2018: 59 · 2017: 73 · 2016: 57 · 2015: 41 · 2014: 52 · 2013: 48 · 2012: 14
FWCI
3.22
Type
journal article
Language
en
Open access
Locations
  • Journal of Sports Sciences (publishedVersion)
  • PubMed (publishedVersion)
  • Research Bank (Australian Catholic University) (submittedVersion)
  • RMIT Research Repository (RMIT University Library) (submittedVersion)
  • Figshare (submittedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
carbohydrate intake, carbohydrate availability, sports nutrition, mouthwash, high-intensity training, endurance events, carbohydrate absorption
MeSH terms
Adaptation, Physiological, Energy Intake, Central Nervous System, Diet, Dietary Carbohydrates, Drug Administration Schedule, Energy Metabolism, Humans, Intestinal Absorption, Nutritional Requirements, Physical Education and Training, Physical Endurance, Rest, Sports, Exercise, Athletic Performance

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