NDLI: Incremental effects of 28 days of beta-alanine supplementation on high-intensity cycling performance and blood lactate in masters female cyclists

Content Provider	Springer Nature Link
Author	Glenn, J. M. Gray, M. Stewart, R. Moyen, N. E. Kavouras, S. A. DiBrezzo, R. Turner, R. Baum, J.
Copyright Year	2015
Abstract	Within the aging population, there exists a subset of individuals termed masters athletes (MA). As masters-level competition increases in popularity, MA must find methods to enhance individual athletic performance. Longitudinal beta-alanine (BA) supplementation is suggested to enhance physical capability during exercise; however, these effects have not been evaluated in MA. To examine the longitudinal effects of BA on time to exhaustion (TTE), total work completed (TWC), and lactate clearance in female MA cyclists. Twenty-two female MA (age = 53.3 ± 1.0) participated in this double-blind design. Subjects were randomly assigned to BA (n = 11; 800 mg BA + 8 g dextrose) or placebo (PLA; n = 11; 8 g dextrose) groups and supplemented 4 doses/day over 28 days. Every 7 days, subjects completed a cycling TTE at 120 % VO2max, and TWC was calculated. Blood lactate was measured at baseline, immediate post, and 20-min post each TTE. No significant differences existed between groups for any variable at baseline (p > 0.05). After 28 days supplementation, BA had greater TTE (23 vs 1 % change) and TWC (21 vs 2 % change) than PLA (p < 0.05). Following the 20-min TTE recovery, lactate was 24 % lower in BA compared to PLA (4.35 vs. 5.76 mmol/L, respectively). No differences existed for variables during intermittent weeks. 28 days of BA supplementation increased cycling performance via an enhanced time to exhaustion and total work completed with associated lactate clearance during passive rest in female MA.
Starting Page	2593
Ending Page	2600
Page Count	8
File Format	PDF
ISSN	09394451
Journal	Amino Acids
Volume Number	47
Issue Number	12
e-ISSN	14382199
Language	English
Publisher	Springer Vienna
Publisher Date	2015-08-09
Publisher Place	Vienna
Access Restriction	Subscribed
Subject Keyword	Ergogenic aid Exercise Women Sport nutrition Carnosine Biochemistry Analytical Chemistry Biochemical Engineering Life Sciences Proteomics Neurobiology
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Clinical Biochemistry

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