my buddy came to me interested in lifting so i gave him some reading material and he ended up getting starting strength off ebay. only problem is he's remained somewhat sedentary and has no real athletic background. he was showing me his deadlift and his squat form and the problem is he can't even squat without his heels coming off the ground. now, i'm no coach or kinesiologist but i'm guessing this is due to poor hamstring flexibility. how would he go about correcting this? besides the obvious "stretching" reply, i'd like to know what exercises, dynamic/static, how many seconds he should hold them for, etc. or maybe i'm way off base and have no clue what the fuck i'm talking about. any help would be appreciated.