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Cited by 8Muscle metabolism and nutritionSports Performance and TrainingThermoregulation and physiological responses

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

Post-Exercise Ingestion of Low or High Molecular Weight Glucose Polymer Solution Does Not Improve Cycle Performance in Female Athletes

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Mock, Meredith G., Hirsch, Katie R., Blue, Malia N.M., Trexler, Eric T., Roelofs, Erica J., Smith-Ryan, Abbie E.·2021·Journal of Strength & Conditioning Research
DOI 10.1519/jsc.0000000000002560PMC PMC6110985
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Abstract

Mock, MG, Hirsch, KR, Blue, MNM, Trexler, ET, Roelofs, EJ, and Smith-Ryan, AE. Postexercise ingestion of low or high molecular weight glucose polymer solution does not improve cycle performance in female athletes. J Strength Cond Res 35(1): 124–131, 2021—The current study sought to evaluate the effects of postexercise ingestion of a high molecular weight (HMW) glucose polymer solution compared with an isocaloric low molecular weight (LMW) solution or placebo (PLA) on subsequent cycling performance in female athletes. In a randomized, double-blind, placebo-controlled, cross-over design, 10 competitive female cyclists (Mean ± SD ; Age = 25.7 ± 5.0 years; V̇ o 2 peak = 49.7 ± 4.3 ml·kg −1 ·min −1 ) completed 3 testing sessions separated by 7–10 days. Visits consisted of a ride-to-exhaustion (RTE) at 75% V̇ o 2 peak, followed by immediate consumption of 700 ml containing either: 1.2 g·kg −1 LMW (maltodextrin/dextrose/fructose); 1.2 g·kg −1 HMW (Vitargo); or 0.066 g·kg −1 PLA (noncaloric flavoring). After 2 hours of rest, subjects performed a 15-minute time trial (TT). Respiratory exchange ratio (RER) was assessed via indirect calorimetry during exercise. Total body water (TBW) was measured using bioelectrical impedance to assess fluid balance. When covaried for estrogen, there was no treatment effect on distance (km; p = 0.632) or power output (watts; p = 0.974) during the 15-minute TT. Respiratory exchange ratio was not significantly different during the LMW and HWM TTs ( p > 0.999), but both were significantly higher than PLA ( p = 0.039, p = 0.001, respectively). Changes in total body water pre-exercise to postexercise were not significantly different between trials ( p = 0.777). Despite benefits of HMW on cycling performance previously reported in males, current results demonstrate no ergogenic effect of HMW or LMW in females. Sex differences in substrate utilization may account for the discrepancy, and further research involving performance nutrition for female athletes is merited.

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Metadata

Authors
Mock, M. G., Hirsch, K. R., Blue, M. N. M., Trexler, E. T., Roelofs, E. J., & Smith-Ryan, A. E.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • Meredith College (US)
  • Department of Exercise and Sport Science, Applied Physiology Laboratory, University of North Carolina, Chapel Hill, North Carolina;
ORCID
Venue
Journal of Strength & Conditioning Research
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2021-01
Volume
35
Issue
1
Pages
124-131
ISSN
1064-8011 (ISSN-L)
DOI
10.1519/jsc.0000000000002560
PMC
PMC6110985
OpenAlex
W2791360161
Cited by
8
References
36
Citations by year
2024: 2 · 2022: 3
FWCI
0.42
Type
journal article
Language
en
Open access
Locations
  • The Journal of Strength and Conditioning Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (KL2TR001109)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Physiology (medical) › Thermoregulation and physiological responses
Keywords
maltodextrin, women cyclists, cycling performance, ergogenic aids, carbohydrate supplementation, respiratory exchange ratio, total body water, fluid balance, sex differences, time trial performance, estrogen, female athletes
MeSH terms
Adult, Bicycling, Double-Blind Method, Eating, Female, Glucans, Humans, Male, Molecular Weight, Polymers, Cross-Over Studies, Young Adult, Athletes

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