Alpha-actinin-3 (ACTN3) R577X polymorphism influences knee extensor peak power response to strength training in older men and women. - Delmonico,MJ.; Kostek,MC.; Doldo,NA.; Hand,BD.; Walsh,S.; Conway,JM.; Carignan,CR.; Roth,SM.; Hurley,BF. (J Gerontol A Biol Sci Med Sci, 2007)