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Cited by 33

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

The Effect of Dietary Protein on Protein Metabolism and Performance in Endurance-trained Males

WILLIAMSON, ERIC, KATO, HIROYUKI, VOLTERMAN, KIMBERLY A., SUZUKI, KATSUYA, MOORE, DANIEL R.·2019·Medicine & Science in Sports & Exercise
DOI 10.1249/mss.0000000000001791
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Abstract

Recommendations for dietary protein are primarily based on intakes that maintain nitrogen (i.e., protein) balance rather than optimize metabolism and/or performance. Purpose: This study aimed to determine how varying protein intakes, including a new tracer-derived safe intake, alter whole body protein metabolism and exercise performance during training. Methods: Using a double-blind randomized crossover design, 10 male endurance-trained runners (age, 32 ± 8 yr; V˙O 2peak , 65.9 ± 7.9 mL O 2 ·kg −1 ·min −1 ) performed three trials consisting of 4 d of controlled training (20, 5, 10, and 20 km·d −1 , respectively) while consuming diets providing 0.94 (LOW), 1.20 (MOD), and 1.83 (HIGH) g protein·kg −1 ·d −1 . Whole body protein synthesis, breakdown, and net balance were determined by oral [ 15 N]glycine on the first and last day of the 4-d controlled training period, whereas exercise performance was determined from maximum voluntary isometric contraction, 5-km time trial, and countermovement jump impulse (IMP) and peak force before and immediately after the 4-d intervention. Results: Synthesis and breakdown were not affected by protein intake, whereas net balance showed a dose–response (HIGH > MOD > LOW , P < 0.05) with only HIGH being in positive balance ( P < 0.05). There was a trend ( P = 0.06) toward an interaction in 5-km Time Trial with HIGH having a moderate effect over LOW (effect size = 0.57) and small effect over MOD (effect size = 0.26). IMP decreased with time ( P < 0.01) with no effect of protein ( P = 0.56). There was no effect of protein intake ( P ≥ 0.06) on maximum voluntary isometric contraction, IMP, or peak force performance. Conclusion: Our data suggest that athletes who consume dietary protein toward the upper end of the current recommendations by the American College of Sports Medicine (1.2–2 g·kg −1 ) would better maintain protein metabolism and potentially exercise performance during training.

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Research works printed but not linked: 30

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Cited by

Metadata

Authors
WILLIAMSON, E., KATO, H., VOLTERMAN, K. A., SUZUKI, K., & MOORE, D. R.
Venue
Medicine & Science in Sports & Exercise
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2019-02
Volume
51
Issue
2
Pages
352-360
ISSN
  • 1530-0315
  • 0195-9131
DOI
10.1249/mss.0000000000001791
Cited by
33
References
9
Language
en

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