After I do 50 push ups, but wrist starts to hurt.Should I start using my knuckles instead of my palm?
You could just stop at 49.
By "but" I mean "my", in case there's any confusion.
get a backpack, fill it full of heavy stuff, and do less pushups.
>>424551does that really work?
you could also try not being a pussy.
paralettes or do dips