Researchers from the Centre for Metabolic Fitness and Nutritional Physiology
Research Centre in Australia
put whey protein to the ultimate test of muscle damage…Eccentric exercise!They
had male participants perform 100 maximal eccentric contractions with leg
extension and were either given a flavored water, 25g Whey protein isolate , or
25g Hydrolyzed whey (or whey protein hydrolysate).Hydrolyzed whey is usually a whey protein
isolate that have had some of its amino acid peptide bonds broken enzymatically
into shorter chains of amino acids. This leads to better absorption in the
stomach. Interesting, peak muscle force decreased approximately 23% following
eccentric exercise and remained suppressed in the control and whey protein
isolate group, but recovered fully in whey protein hydrolysate group by 6 hours.
Muscle soreness increased in all group with no difference between any if the
groups.The research suggests that whey
protein hydrolysates but not isolate increases muscle recovery from damaging
eccentric exercise.Whey protein hydrolysates
seem to be a superior source of whey protein compared to isolates.
