학술논문
Ðæ-Lactalbumin Improves Sleep and Recovery after Simulated Evening Competition in Female Athletes
Document Type
Clinical report
Author
Source
Medicine and Science in Sports and Exercise. December 1, 2021, Vol. 53 Issue 12, p2618, 10 p.
Subject
Language
English
ISSN
0195-9131
Abstract
Byline: KATHLEEN H. MILES; BRAD CLARK, Research Institute for Sport and Exercise, University of Canberra, Canberra, AUSTRALIA ; PETER M. FOWLER, School of Exercise and Nutrition Sciences, Queensland University of Technology, Brisbane, AUSTRALIA ; MADELEINE J. GRATWICKE, Research Institute for Sport and Exercise, University of Canberra, Canberra, AUSTRALIA ; KRISTY MARTIN; MARIJKE WELVAERT, Research Institute for Sport and Exercise, University of Canberra, Canberra, AUSTRALIA ; JOANNA MILLER, AIS Operations, Australian Institute of Sport, Bruce, Canberra, AUSTRALIA ; KATE L. PUMPA Abstract PURPOSE: This study aimed to determine the efficacy of ð-lactalbumin (A-LAC) supplementation for improving sleep and performance recovery after simulated evening competition in female athletes. METHODS: Sixteen trained women (mean Ø SD: age, 27 Ø 7 yr; mass, 62 Ø 10 kg; stature, 167 Ø 8 cm) participated in this randomized double-blind three-arm crossover study. Participants completed a simulated evening competition before consuming either an A-LAC whey protein, whey protein placebo (PLA), or water control (CON) beverage. Sleep was monitored via polysomnography, and participants completed a series of physical, cognitive, and perceptual assessments before, and 14 and 24 h after simulated competition. RESULTS: Non-rapid eye movement stage 2 sleep increased after competition in A-LAC (pre, 199 Ø 44 min; post, 212 Ø 37 min) but decreased in CON (pre, 228 Ø 43 min; post, 195 Ø 40 min) and PLA (pre, 224 Ø 25 min; post, 211 Ø 35 min; P = 0.012). In addition, Yo-Yo Intermittent Recovery Test Level 1 distance improved over time in A-LAC (baseline, 664 Ø 332 m; 14 h post, 667 Ø 326 m; 24 h post, 781 Ø 427 m) compared with CON (baseline, 741 Ø 366 m; 14 h post, 648 Ø 351 m; 24 h post, 720 Ø 407 m) and PLA (baseline, 763 Ø 394 m; 14 h post, 636 Ø 366 m; 24 h post, 720 Ø 396 m; P < 0.001). CONCLUSIONS: The findings indicate that A-LAC supplementation may be useful for retaining some sleep characteristics after evening competition, leading to improved physical performance in female athletes.