So I applied for Artillery Soldier Field yesterday, and I need to prepare for BMQ ( if I get accepted of course) , my push up is coming along nicely, sit ups also, running too, only thing I believe I need to work on is my Chin-ups/ pull ups. How often should I do chin-ups? Should I do it the same day I do weight lift for my biceps? Or the day after, then have 1 rest day after chin ups? Also, I am able to do about 1-2 chin ups and then can't, should I practice holding the position when im down and up of the bar and should i practice slowly going from up position to down? But how often should I do it? At what point can it be dangerous for doing it too much?