So i ran into an old workout buddy i hadn't seen in a couple years and he looked good, holy crap he put on some size and ripped. we used to train together and we were average guys, now he looks like a bodybuilder. he said that his secret was tae kwon do training he would do 2-3X per week on days he didn't lift. says it helped him go further. is this possible or is he jerking me?