1: J Sci Med Sport. 2008 Sep 1. [Epub ahead of print]Click here to read Links
Supplementation with a whey protein hydrolysate enhances recovery of
muscle force-generating capacity following eccentric exercise.
Buckley JD, Thomson RL, Coates AM, Howe PR, Denichilo MO, Rowney MK.
Australian Technology Network Centre for Metabolic Fitness and
Nutritional Physiology Research Centre, University of South Australia,
Adelaide, South Australia, Australia.
There is evidence that protein hydrolysates can speed tissue repair
following damage and may therefore be useful for accelerating recovery
from exercise induced muscle damage. The potential for a hydrolysate
(WPI(HD)) of whey protein isolate (WPI) to speed recovery following
eccentric exercise was evaluated by assessing effects on recovery of
peak isometric torque (PIT). In a double-blind randomised parallel
trial, 28 sedentary males had muscle soreness (MS), serum creatine
kinase (CK) activity, plasma TNFalpha, and PIT assessed at baseline
and after 100 maximal eccentric contractions (ECC) of their knee
extensors. Participants then consumed 250ml of flavoured water (FW;
n=11), or FW containing 25g WPI (n=11) or 25g WPI(HD) (n=6) and the
assessments were repeated 1, 2, 6 and 24h later. PIT decreased
approximately 23% following ECC, remained suppressed in FW and WPI,
but recovered fully in WPI(HD) by 6h (P=0.006, treatmentxtime
interaction). MS increased following ECC (P<0.001 for time), and
remained elevated with no difference between groups (P=0.61). TNFalpha
and CK did not change (P>0.45). WPI(HD) may be a useful supplement for
assisting athletes to recover from fatiguing eccentric exercise.
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