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Appl Physiol Nutr Metab. 2018 Apr;43(4):324-330. doi: 10.1139/apnm-2017-0412. Epub 2017 Nov 6.

Whey protein hydrolysate supplementation accelerates recovery from exercise-induced muscle damage in females.

Author information

1
a School of Sport and Exercise, University of Gloucestershire, Gloucester, GL2 9HW, UK.
2
b Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
3
c Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle, NE2 4HH, UK.
4
d Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
5
e Water Research Group, School of Environmental Sciences and Development, Northwest University, Potchefstroom, South Africa.

Abstract

A number of different forms of protein and their analogues have been investigated for their efficacy in ameliorating exercise-induced muscle damage (EIMD) and recovery. Preliminary data regarding whey protein hydrolysate (WPH) supplementation are promising. However, its efficacy beyond acute eccentric/resistance exercise bouts or longer term training programmes are limited and all investigations have been conducted in male or mixed-sex groups. This study sought to elucidate whether the benefits of WPH previously reported can be demonstrated in females following repeated-sprint exercise. Twenty physically active females were assigned to consume 2 doses of 70 mL WPH or isoenergetic carbohydrate (CHO) for 4 days post-EIMD. Measures of muscle soreness, limb girth, flexibility, muscle function, and creatine kinase were collected before, immediately after, and 24, 48, and 72 h postexercise. Time effects were observed for all variables (p < 0.05) except limb girth, which is indicative of EIMD. Flexibility improved beyond baseline measures following WPH by 72 h, but had failed to recover in the CHO group (p = 0.011). Reactive strength index was higher throughout recovery in the WPH group compared with CHO (p = 0.016). Reductions in creatine kinase were greater following WPH compared with CHO at 48 h post-EIMD (p = 0.031). The findings suggest that 4-day supplementation of WPH is beneficial for reducing symptoms of EIMD and improving recovery of muscle function in physically active females.

KEYWORDS:

creatine kinase; créatine kinase; flexibilité des ischiojambiers; hamstring flexibility; indice de force réactive; reactive strength index; repeated sprint; sprint répété

PMID:
29106812
DOI:
10.1139/apnm-2017-0412
[Indexed for MEDLINE]

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