Rapid carbohydrate loading after a short bout of near maximal-intensity exercise

T. Fairchild, S. Fletcher, P. Steele, Carmel Goodman, Brian Dawson, Paul Fournier

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

FAIRCHILD, T. J., S. FLETCHER, P. STEELE, C. GOODMAN, B. DAWSON, and P. A. FOURNIER. Rapid carbohydrate loading after a short bout of near maximal-intensity exercise. Med. Sci. Sports Exerc., Vol. 34. No. 6, pp. 980-986. 2002. Purpose: One limitation shared by all Published carbohydrate-loading regimens is that 2-6 d are required for the attainment of supranormal muscle glyco-en levels. Because high rates of glycogen resynthesis are reported during recovery from exercise of near-maximal intensity and that these rates could in theory allow muscle to attain suptanormal glycogen levels in less than 24 h. the purpose of this study was to examine whether a combination of a short bout of high-intensity exercise with I d of a high-carbohydrate intake offers the basis for an improved carbohydrate-loading regimen. Methods: Seven endurance-trained athletes cycled for 150 s at 130% VO2peak followed by 30 s of all-out cycling. During the following 24 h, each subject was asked to ingest 12 g.kg(-1) of lean body mass (the equivalent of 10.3 g.kg(-1) body mass) of high-carbohydrate foods with a high glycemic index. Results: Muscle glycogen increased from preloading levels (+/- SE) of 109.1 +/- 8.2 to 198.2 +/- 13.1 mmol.kg(-1) wet weight within only 24 h, these levels being comparable to or higher than those reported by others over a 2- to 6-d regimen. Densitometric analysis Of muscle sections stained with periodic acid-Schiff not only corroborated these findings but also indicated that after 24 h of high-carbohydrate intake. glycogen stores reached similar levels in Type I, IIa. and IIb muscle fibers. Conclusion: This study shows that a combination of a short-term bout of high-carbohydrate intake enables athletes to attain supranormal muscle high-intensity exercise followed by a high-carbohydrate intake enables athletes to attain supranormal muscle glycogen levels within only 24 h.
Original languageEnglish
Pages (from-to)980-986
JournalMedicine and Science in Sports and Exercise
Volume1
DOIs
Publication statusPublished - 2002

Fingerprint

Glycogen
Exercise
Muscles
Carbohydrates
Athletes
Glycemic Index
Periodic Acid
Carbohydrate Loading Diet
Sports
Weights and Measures
Food

Cite this

@article{d6428f42127b4c19b5db20f340e84df4,
title = "Rapid carbohydrate loading after a short bout of near maximal-intensity exercise",
abstract = "FAIRCHILD, T. J., S. FLETCHER, P. STEELE, C. GOODMAN, B. DAWSON, and P. A. FOURNIER. Rapid carbohydrate loading after a short bout of near maximal-intensity exercise. Med. Sci. Sports Exerc., Vol. 34. No. 6, pp. 980-986. 2002. Purpose: One limitation shared by all Published carbohydrate-loading regimens is that 2-6 d are required for the attainment of supranormal muscle glyco-en levels. Because high rates of glycogen resynthesis are reported during recovery from exercise of near-maximal intensity and that these rates could in theory allow muscle to attain suptanormal glycogen levels in less than 24 h. the purpose of this study was to examine whether a combination of a short bout of high-intensity exercise with I d of a high-carbohydrate intake offers the basis for an improved carbohydrate-loading regimen. Methods: Seven endurance-trained athletes cycled for 150 s at 130{\%} VO2peak followed by 30 s of all-out cycling. During the following 24 h, each subject was asked to ingest 12 g.kg(-1) of lean body mass (the equivalent of 10.3 g.kg(-1) body mass) of high-carbohydrate foods with a high glycemic index. Results: Muscle glycogen increased from preloading levels (+/- SE) of 109.1 +/- 8.2 to 198.2 +/- 13.1 mmol.kg(-1) wet weight within only 24 h, these levels being comparable to or higher than those reported by others over a 2- to 6-d regimen. Densitometric analysis Of muscle sections stained with periodic acid-Schiff not only corroborated these findings but also indicated that after 24 h of high-carbohydrate intake. glycogen stores reached similar levels in Type I, IIa. and IIb muscle fibers. Conclusion: This study shows that a combination of a short-term bout of high-carbohydrate intake enables athletes to attain supranormal muscle high-intensity exercise followed by a high-carbohydrate intake enables athletes to attain supranormal muscle glycogen levels within only 24 h.",
author = "T. Fairchild and S. Fletcher and P. Steele and Carmel Goodman and Brian Dawson and Paul Fournier",
year = "2002",
doi = "10.1097/00005768-200206000-00012",
language = "English",
volume = "1",
pages = "980--986",
journal = "Medicine & Science in Sports & Exercise",
issn = "0195-9131",
publisher = "Lippincott Williams & Wilkins",

}

Rapid carbohydrate loading after a short bout of near maximal-intensity exercise. / Fairchild, T.; Fletcher, S.; Steele, P.; Goodman, Carmel; Dawson, Brian; Fournier, Paul.

In: Medicine and Science in Sports and Exercise, Vol. 1, 2002, p. 980-986.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rapid carbohydrate loading after a short bout of near maximal-intensity exercise

AU - Fairchild, T.

AU - Fletcher, S.

AU - Steele, P.

AU - Goodman, Carmel

AU - Dawson, Brian

AU - Fournier, Paul

PY - 2002

Y1 - 2002

N2 - FAIRCHILD, T. J., S. FLETCHER, P. STEELE, C. GOODMAN, B. DAWSON, and P. A. FOURNIER. Rapid carbohydrate loading after a short bout of near maximal-intensity exercise. Med. Sci. Sports Exerc., Vol. 34. No. 6, pp. 980-986. 2002. Purpose: One limitation shared by all Published carbohydrate-loading regimens is that 2-6 d are required for the attainment of supranormal muscle glyco-en levels. Because high rates of glycogen resynthesis are reported during recovery from exercise of near-maximal intensity and that these rates could in theory allow muscle to attain suptanormal glycogen levels in less than 24 h. the purpose of this study was to examine whether a combination of a short bout of high-intensity exercise with I d of a high-carbohydrate intake offers the basis for an improved carbohydrate-loading regimen. Methods: Seven endurance-trained athletes cycled for 150 s at 130% VO2peak followed by 30 s of all-out cycling. During the following 24 h, each subject was asked to ingest 12 g.kg(-1) of lean body mass (the equivalent of 10.3 g.kg(-1) body mass) of high-carbohydrate foods with a high glycemic index. Results: Muscle glycogen increased from preloading levels (+/- SE) of 109.1 +/- 8.2 to 198.2 +/- 13.1 mmol.kg(-1) wet weight within only 24 h, these levels being comparable to or higher than those reported by others over a 2- to 6-d regimen. Densitometric analysis Of muscle sections stained with periodic acid-Schiff not only corroborated these findings but also indicated that after 24 h of high-carbohydrate intake. glycogen stores reached similar levels in Type I, IIa. and IIb muscle fibers. Conclusion: This study shows that a combination of a short-term bout of high-carbohydrate intake enables athletes to attain supranormal muscle high-intensity exercise followed by a high-carbohydrate intake enables athletes to attain supranormal muscle glycogen levels within only 24 h.

AB - FAIRCHILD, T. J., S. FLETCHER, P. STEELE, C. GOODMAN, B. DAWSON, and P. A. FOURNIER. Rapid carbohydrate loading after a short bout of near maximal-intensity exercise. Med. Sci. Sports Exerc., Vol. 34. No. 6, pp. 980-986. 2002. Purpose: One limitation shared by all Published carbohydrate-loading regimens is that 2-6 d are required for the attainment of supranormal muscle glyco-en levels. Because high rates of glycogen resynthesis are reported during recovery from exercise of near-maximal intensity and that these rates could in theory allow muscle to attain suptanormal glycogen levels in less than 24 h. the purpose of this study was to examine whether a combination of a short bout of high-intensity exercise with I d of a high-carbohydrate intake offers the basis for an improved carbohydrate-loading regimen. Methods: Seven endurance-trained athletes cycled for 150 s at 130% VO2peak followed by 30 s of all-out cycling. During the following 24 h, each subject was asked to ingest 12 g.kg(-1) of lean body mass (the equivalent of 10.3 g.kg(-1) body mass) of high-carbohydrate foods with a high glycemic index. Results: Muscle glycogen increased from preloading levels (+/- SE) of 109.1 +/- 8.2 to 198.2 +/- 13.1 mmol.kg(-1) wet weight within only 24 h, these levels being comparable to or higher than those reported by others over a 2- to 6-d regimen. Densitometric analysis Of muscle sections stained with periodic acid-Schiff not only corroborated these findings but also indicated that after 24 h of high-carbohydrate intake. glycogen stores reached similar levels in Type I, IIa. and IIb muscle fibers. Conclusion: This study shows that a combination of a short-term bout of high-carbohydrate intake enables athletes to attain supranormal muscle high-intensity exercise followed by a high-carbohydrate intake enables athletes to attain supranormal muscle glycogen levels within only 24 h.

U2 - 10.1097/00005768-200206000-00012

DO - 10.1097/00005768-200206000-00012

M3 - Article

VL - 1

SP - 980

EP - 986

JO - Medicine & Science in Sports & Exercise

JF - Medicine & Science in Sports & Exercise

SN - 0195-9131

ER -