With pull ups and chins, is it best to have your palms facing you or facing away? I've been reading some stuff lately that seems to imply that doing them with an overhanded grip is basically useless and actually detrimental. However, for me, overhanded is harder than underhanded grip, which is why I prefer overhanded grip. Does this even make that much of a difference? I imagine with an overhanded grip, it targets the biceps less and hits the back more. My lats usually feel real tight after doing these, but I don't feel that tightness when I do it underhanded. Is there any advantage to using an underhanded grip? Should I consider alternating the grip between sets or should I just stick to the overhanded grip?