try to lean over all your palm and not just your werst , when you will need yo use your wrest solo, you will know.
also do staff to make your wrist stronger so it will prevent injery , since you do tennis , i geuss your muscle mass over your wrist is lower but has more endurance, to break you got to have both , but more strength(to my opinion).
the reason you cant do shit is cuase breakin works on difrrent muscle then normal things you do , running will not make you stronger , however increase your endurance.
push up will give you chest and triseps strenth but not what you you need to work on your upper chest, try to put your feet on your bed and do push ups while your on the floor(or better do push up while your legs are on the wall ,above your head)
if you are lookin' for muscle to work on , try the trieseps(most important) back , and for the wrist try sopination and pronation(if that is how its written)
if you want to jump then you'll need strong legs ... but thats another story.
and try to use your skeleton to support yourself more then your muscle .
oww and if you are talking about pain , try changing your d n a , talk to your mother to simply replace your father, that should do the work
enjoy