i like to practice dunks, but sometimes i slam my hand down so hard on the rim that afterward i have redness and pinpoints under the skin where the contact is made with the rim. Also sometimes it hurts when i flush it down so hard that i have to take a break for a little. anyone experience this...?
yes I have experience... on 9 foot rims and lower.
anyway, dunking hard on the rim hurts your hands and wrists if you do it forcefully.
if you can jump high enough, try to force the ball into the hoop without ever touching the rim, or at least minimize contact. it's the kind of dunk where you can bring the palmed ball direcftly above the cylinder, then flush the ball and your hand down the center of the cylinder, and bring your hand out, so the ball swishes the net as it goes down.
if you can just barely dunk and can't soar any higher, considering just laying it in and conserving energy and your hand endurance for breakaways when you can show off.
in time you'll develop callouses and it wont be a problem, at least for the pinpoints or blisters or whatever skin issues you may be experiencing. In the meanitme just deal with it
re the slamming effect, when you dunk hard, you shouldnt bash your hand against the rim (or your forearm for that matter) you should try more of a grip type effort with the rim (kind of like a trapeeze artist grabbing for the bar), come down hard but also pull hard (this creates the same powerful effect). This way you transfer the energy more and save your body and more delicate pieces like hands and forearms from injury
and with a good grip on the rim you dont have to worry about landing on one of your teammates feet and rolling an ankle during a drill in practice because you have a good grip on the rim and you can hang if need be