Effects of whey protein in carbohydrate-electrolyte drinks on post-exercise rehydration

Liang Li, Feng Hua Sun, Wendy Y J HUANG, Stephen Heung Sang Wong*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The purpose of this study was to examine the effects of different amounts of whey protein in carbohydrate–electrolyte (CE) drinks on post-exercise rehydration. Ten males completed 5 trials in a randomised cross-over design. A 4-h recovery was applied after a 60-min run at 65% VO2peak in each trial. During recovery, the participants ingested a high-carbohydrate CE drink (CE-H), a low-carbohydrate CE drink (CE-L), a high-whey-protein (33 g·L−1) CE drink (CW-H), a medium-whey-protein (22 g·L−1) CE drink (CW-M) or a low-whey-protein (15 g·L−1) CE drink (CW-L) in a volume equivalent to 150% of their body mass (BM) loss. The drinks were provided in six equal boluses and consumed by the participants within 150 min in each trial. After exercise, a BM loss of 2.15% ± 0.05% was achieved. Urine production was less in the CW-M and CW-H trials during recovery, which induced a greater fluid retention in the CW-M (51.0% ± 5.7%) and CW-H (55.4% ± 3.8%) trials than in any other trial (p <.05). The plasma albumin content was higher in the CW-H trial than in the CE-H and CE-L trials at 2 h (p <.05) and 3 h (p <.01) during recovery. The aldosterone concentration was lower in the CE-H trial than in the CW-M and CW-H trials after recovery (p <.05). It is concluded that the rehydration was improved when whey protein was co-ingested with CE drinks during a 4-h recovery after a 60-min run. However, this additive effect was only observed when whey protein concentration was at least 22 g·L−1 in the current study.

Original languageEnglish
Pages (from-to)685-694
Number of pages10
JournalEuropean Journal of Sport Science
Volume18
Issue number5
DOIs
Publication statusPublished - 28 May 2018

Scopus Subject Areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

User-Defined Keywords

  • aldosterone
  • fluid retention
  • plasma albumin
  • Whey protein

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