Thank you, and I've heard that fingertip pushups actually weaken the joints in the hand, and since the only people who would probably NEED to have strong hands are mantis and the seemingly extinct She Quan people.
Cuong Nhu requires Fingertip push ups. Before I started doing them, I had a crappy grip. Now, people sometimes bend down in pain at how strong my gripp is. Granted, I do 30 a day (which is bordering on idiocy), and I get a chance to really set my gripp.
Nextly, push ups can help. The hard part is knowing how, which to do, and knowing to work up to it. When I started doing fingertip my sister insteded that i was going severly damage my hands. I brought this up with one of my schools coaches, he said as long as I work up to a safe point, I'll be fine. Doing knuckle push ups might be better. Put your habds in a punching position, and do puch ups like that. Or extend you arms past the normal reach, and do push ups that way. It builds chest/shoulder strength.
Also, if you want my oppion, weightlifting can be beneficial. But I perfer body weight only. You might find that you will come to rely on musclular strength. I know several people who lifted weights while doing Wing Chun, and noticed that tended to happen. Body weight exercises seem to have a lesser effect.
A good strengthening exercise is to do Sinawali (a Filophino drill) done with two steel pipes is a great exercise. I do 6 versions of Sinalwali every day when I wake up. My Sensei (I train in a Vietnamese Art with Wing Chun in it, but has a heavy Japanese infleunce) has noticed a massive increase in my punch strength. You can check the section on Filiphino arts for some suggestions.
But, as Michaeledward brought up, push ups work on the push part, not the pull. To work on that, look at your forms. There's a reason why you load your hand were you do. By holding your hand back high and tight, but not resting it on your body or hunching your shoulder, you train your bicep.
