Conclusion Overall , our findings do not support the presence of a secondary loss of strength following an acute muscle injury , and strongly suggest that strength , on average , recovers steadily over the first 3 days post-injury
Background An immediate loss of strength follows virtually all types of muscle injury but there is debate whether the initial strength loss is maximal or if a secondary loss of strength occurs during the first 3 days post-injury .
Objective The objective of this analysis was to conduct a systematic review and meta- analysis of the research literature to determine if a secondary loss of strength occurs after an injurious initiating event .
Supplementation with a whey protein hydrolysate enhances recovery of muscle force-generating capacity following eccentric exercise.
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 r and omised 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 250 ml of flavoured water ( FW ; n=11 ) , or FW containing 25 g WPI ( n=11 ) or 25 g WPI(HD ) ( n=6 ) and the assessment s 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 , treatment x time 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
Conclusion Overall , our findings do not support the presence of a secondary loss of strength following an acute muscle injury , and strongly suggest that strength , on average , recovers steadily over the first 3 days post-injury
Background An immediate loss of strength follows virtually all types of muscle injury but there is debate whether the initial strength loss is maximal or if a secondary loss of strength occurs during the first 3 days post-injury .
Objective The objective of this analysis was to conduct a systematic review and meta- analysis of the research literature to determine if a secondary loss of strength occurs after an injurious initiating event .