Repeated muscle glycogen supercompensation with four days’ recovery between exhaustive exercise

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Objectives
to determine if a 4 d period of high carbohydrate intake can supercompensate muscle glycogen and exercise work capacity on back-to-back occasions.

Design
seven trained cyclists (6 male, VO2peak: 57 ± 4 mL kg-1 min-1) completed a 9-d experimental period, consisting of three intermittent exhaustive cycling trials on days 1 (trial 1), 5 (trial 2) and 9 (trial 3). Following trial 1 cyclists were fed a high carbohydrate diet (˜10 g kg-1 day-1) for eight days to assess their capacity to repeatedly supercompensate muscle glycogen with 4 d recovery.

Methods
a resting muscle biopsy was obtained prior to each trial consisting of 2 min work intervals (90-60% peak power output) interspersed with 2 min recovery (40% peak power output) repeated until exhaustion. Each 72-h period between trial days included two days of low volume cycling and a rest day. Resting muscle glycogen and total work completed was determined for each trial day.

Results
baseline muscle glycogen on day 1 (583.6 ± 111.0 mmol kg-1 dry mass) was supercompensated on day 5 (835.1 ± 112.8 mmol kg-1 dry mass; p = 0.04, d = 2.25) and again on day 9 (848.3 ± 111.4 mmol kg-1 dry mass; p = 0.01, d = 2.38). Total cycling work capacity increased from trial 1 to trial 2 (+8.7 ± 5.4 kJ kg-1; p = 0.01; d = 1.41); a large effect was observed in trial 3 compared to trial 1 (+6.4 ± 6.8 kJ kg-1; p = 0.10; d = 1.10).

Conclusions
a 4 d high carbohydrate feeding strategy is sufficient to repeatedly supercompensate muscle glycogen content following exhaustive exercise and results in enhanced work capacity.
Original languageEnglish
Pages (from-to)907-911
Number of pages5
JournalJournal of Science and Medicine in Sport
Volume22
Issue number8
Early online date23 Mar 2019
DOIs
Publication statusPublished - 1 Aug 2019

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Glycogen
Muscles
Carbohydrates
Diet
Biopsy

Cite this

@article{2261782fb55644bf9044c63014ec59b7,
title = "Repeated muscle glycogen supercompensation with four days’ recovery between exhaustive exercise",
abstract = "Objectivesto determine if a 4 d period of high carbohydrate intake can supercompensate muscle glycogen and exercise work capacity on back-to-back occasions.Designseven trained cyclists (6 male, VO2peak: 57 ± 4 mL kg-1 min-1) completed a 9-d experimental period, consisting of three intermittent exhaustive cycling trials on days 1 (trial 1), 5 (trial 2) and 9 (trial 3). Following trial 1 cyclists were fed a high carbohydrate diet (˜10 g kg-1 day-1) for eight days to assess their capacity to repeatedly supercompensate muscle glycogen with 4 d recovery.Methodsa resting muscle biopsy was obtained prior to each trial consisting of 2 min work intervals (90-60{\%} peak power output) interspersed with 2 min recovery (40{\%} peak power output) repeated until exhaustion. Each 72-h period between trial days included two days of low volume cycling and a rest day. Resting muscle glycogen and total work completed was determined for each trial day.Resultsbaseline muscle glycogen on day 1 (583.6 ± 111.0 mmol kg-1 dry mass) was supercompensated on day 5 (835.1 ± 112.8 mmol kg-1 dry mass; p = 0.04, d = 2.25) and again on day 9 (848.3 ± 111.4 mmol kg-1 dry mass; p = 0.01, d = 2.38). Total cycling work capacity increased from trial 1 to trial 2 (+8.7 ± 5.4 kJ kg-1; p = 0.01; d = 1.41); a large effect was observed in trial 3 compared to trial 1 (+6.4 ± 6.8 kJ kg-1; p = 0.10; d = 1.10).Conclusionsa 4 d high carbohydrate feeding strategy is sufficient to repeatedly supercompensate muscle glycogen content following exhaustive exercise and results in enhanced work capacity.",
author = "Doering, {Thomas M} and Cox, {Gregory Roland} and Areta, {Jos{\'e} L.} and Coffey, {Vernon G}",
year = "2019",
month = "8",
day = "1",
doi = "10.1016/j.jsams.2019.03.009",
language = "English",
volume = "22",
pages = "907--911",
journal = "Journal of Science and Medicine in Sport",
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Repeated muscle glycogen supercompensation with four days’ recovery between exhaustive exercise. / Doering, Thomas M; Cox, Gregory Roland; Areta, José L.; Coffey, Vernon G.

In: Journal of Science and Medicine in Sport, Vol. 22, No. 8, 01.08.2019, p. 907-911.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Repeated muscle glycogen supercompensation with four days’ recovery between exhaustive exercise

AU - Doering, Thomas M

AU - Cox, Gregory Roland

AU - Areta, José L.

AU - Coffey, Vernon G

PY - 2019/8/1

Y1 - 2019/8/1

N2 - Objectivesto determine if a 4 d period of high carbohydrate intake can supercompensate muscle glycogen and exercise work capacity on back-to-back occasions.Designseven trained cyclists (6 male, VO2peak: 57 ± 4 mL kg-1 min-1) completed a 9-d experimental period, consisting of three intermittent exhaustive cycling trials on days 1 (trial 1), 5 (trial 2) and 9 (trial 3). Following trial 1 cyclists were fed a high carbohydrate diet (˜10 g kg-1 day-1) for eight days to assess their capacity to repeatedly supercompensate muscle glycogen with 4 d recovery.Methodsa resting muscle biopsy was obtained prior to each trial consisting of 2 min work intervals (90-60% peak power output) interspersed with 2 min recovery (40% peak power output) repeated until exhaustion. Each 72-h period between trial days included two days of low volume cycling and a rest day. Resting muscle glycogen and total work completed was determined for each trial day.Resultsbaseline muscle glycogen on day 1 (583.6 ± 111.0 mmol kg-1 dry mass) was supercompensated on day 5 (835.1 ± 112.8 mmol kg-1 dry mass; p = 0.04, d = 2.25) and again on day 9 (848.3 ± 111.4 mmol kg-1 dry mass; p = 0.01, d = 2.38). Total cycling work capacity increased from trial 1 to trial 2 (+8.7 ± 5.4 kJ kg-1; p = 0.01; d = 1.41); a large effect was observed in trial 3 compared to trial 1 (+6.4 ± 6.8 kJ kg-1; p = 0.10; d = 1.10).Conclusionsa 4 d high carbohydrate feeding strategy is sufficient to repeatedly supercompensate muscle glycogen content following exhaustive exercise and results in enhanced work capacity.

AB - Objectivesto determine if a 4 d period of high carbohydrate intake can supercompensate muscle glycogen and exercise work capacity on back-to-back occasions.Designseven trained cyclists (6 male, VO2peak: 57 ± 4 mL kg-1 min-1) completed a 9-d experimental period, consisting of three intermittent exhaustive cycling trials on days 1 (trial 1), 5 (trial 2) and 9 (trial 3). Following trial 1 cyclists were fed a high carbohydrate diet (˜10 g kg-1 day-1) for eight days to assess their capacity to repeatedly supercompensate muscle glycogen with 4 d recovery.Methodsa resting muscle biopsy was obtained prior to each trial consisting of 2 min work intervals (90-60% peak power output) interspersed with 2 min recovery (40% peak power output) repeated until exhaustion. Each 72-h period between trial days included two days of low volume cycling and a rest day. Resting muscle glycogen and total work completed was determined for each trial day.Resultsbaseline muscle glycogen on day 1 (583.6 ± 111.0 mmol kg-1 dry mass) was supercompensated on day 5 (835.1 ± 112.8 mmol kg-1 dry mass; p = 0.04, d = 2.25) and again on day 9 (848.3 ± 111.4 mmol kg-1 dry mass; p = 0.01, d = 2.38). Total cycling work capacity increased from trial 1 to trial 2 (+8.7 ± 5.4 kJ kg-1; p = 0.01; d = 1.41); a large effect was observed in trial 3 compared to trial 1 (+6.4 ± 6.8 kJ kg-1; p = 0.10; d = 1.10).Conclusionsa 4 d high carbohydrate feeding strategy is sufficient to repeatedly supercompensate muscle glycogen content following exhaustive exercise and results in enhanced work capacity.

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DO - 10.1016/j.jsams.2019.03.009

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SN - 1440-2440

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