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The Influence of Starch Structure on Glycogen Resynthesis and Subsequent Cycling Performance
Abstract
The present study was designed to evaluate the influence of starch structure on muscle glycogen resynthesis and cycling performance. Eight male cyclists (22 +/- 1 yr) completed an exercise protocol (DP) to decrease vastus lateralis glycogen concentration. This exercise consisted of 60 min cycling at 75% VO2max, followed by six 1-min sprints at approximately 125% VO2max with 1 min rest intervals. In the 12 hr after the exercise each subject consumed approximately 3000 kcal (65:20:15% carbohydrate, fat and protein). All of the carbohydrate (CHO) consumed was derived from one of four solutions; 1) glucose, 2) maltodextrin (glucose polymer), 3) waxy starch (100% amylopectin), or 4) resistant starch (100% amylose). Muscle biopsies were taken from the vastus lateralis muscle after DP and 24 hr later to determine glycogen concentrations. A 30 min cycling time trial (TT) was performed following the 24 hr post-DP muscle biopsy to examine the influence of the feeding regimen on total work output. The post-DP glycogen concentrations were similar among the four trials, ranging from 220.3 +/- 29.2 to 264 +/- 48.3 mmol.kg-1 dry weight (d.w.) muscle. Twenty-four hours after DP, muscle glycogen concentration had increased less (p < 0.05) in the resistant starch trial (+90.8 +/- 12.8 mmol.kg-1 d.w.) than in the glucose (+197.7 +/- 31.6 mmol.kg-1 d.w.), maltodextrin (+136.7 +/- 24.5 mmol.kg-1 d.w.) and waxy starch (+171.8 +/- 37.1 mmol.kg-1 d.w.) trials. There were no differences in total work output during the TT, or blood lactate concentration immediately following the TT in any of the CHO trials. In summary, glycogen resynthesis was attenuated following ingestion of starch with a high amylose content, relative to amylopectin or glucose; however, short duration time trial performance was unaffected.
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Lower post-exercise glycogen storage occurs from a poorly digestible high amylose starch mixture compared with intake of glucose, maltodextrins and a high amylopectin starch.
“this is supported by observations of lower post-exercise glycogen storage from a poorly digestible high amylose starch mixture compared with intake of glucose, maltodextrins and a high amylopectin starch (53).”
From Postexercise muscle glycogen resynthesis in humans. (2017) · cites this paper as [53]
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Metadata
- Authors
- Jozsi, A., Trappe, T., Starlling, R., Goodpaster, B., Trappe, S., Fink, W., & Costill, D.
- Affiliations
- Ball State University (US)
- Venue
- International Journal of Sports Medicine
- Publisher
- Georg Thieme Verlag KG
- Published
- 1996-07
- Volume
- 17
- Issue
- 05
- Pages
- 373-378
- ISSN
- 0172-4622 (ISSN-L)
- 1439-3964
- OpenAlex
- W2087761878
- Cited by
- 30
- References
- 0
- Citations by year
- 2020: 1 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 1 · 2013: 3
- FWCI
- 0.27
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Sports Medicine (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Nursing › Nutrition and Dietetics › Muscle metabolism and nutrition
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
- Health Sciences › Nursing › Nutrition and Dietetics › Food composition and properties
- Keywords
- muscle glycogen resynthesis, starch structure, amylose, amylopectin, resistant starch, maltodextrin, glucose ingestion, cycling performance, time trial, vastus lateralis, blood lactate
- MeSH terms
- Amylopectin, Amylose, Analysis of Variance, Bicycling, Exercise Test, Glucose, Glycogen, Humans, Male, Polysaccharides, Time Factors, Exercise, Muscle, Skeletal, Lactic Acid
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