All of them. But rotator cuffs usually go first for pitchers and knees for catchers.
Yes because it would not hurt anyone.
Your joints will hurt if the synovial fluid hardens and joints become stiff.
The past tense of hurt is hurt. For example: "She hurt her ankle while playing soccer."
because your joints r hurt
If you stand up for hours while you're playing, possibly.
You will need to see a doctor.
The child fell down from the ladder and got hurt badly.
Anemia
There could be multiple reasons your joints hurt when flexing. You should see your health care provider to rule out health issues.
I don't think it should. Since meat has plenty of protein it should do anything BUT make joints or muscles hurt.
A new piercing and you want to dive on it? Yes it will hurt the piercing.
everywhere but the most would be inbetween the legs