I always seem to know a few people that are dealing with hand pain from playing the piano. I am not talking about arthritis issues that might affect older people; I am rather talking about people who have injured themselves because of the way they play.
It has always been interesting to me that almost everyone I have known with that kind of injury has had a particular profile:
1) Young (still in school/college)
3) A good musician (overachiever)
I have theories about that. I am hardly an expert but I don’t know that there are any physiological differences between male and female hands. But I suspect that girls are more driven then boys at that age in music and they sometimes push too hard. I also think they may sometimes feel pressure to play powerfully and try too hard to get big sound out of a piano.
LIke I said, I am no expert on how to fix the problem and if asked, I refer pianists to someone well versed in the Taubman approach to curing those kinds of issues.
Here is a video I did today about this problem though and it demonstrates how gravity is really all you need to get a big sound out of a piano and how to check yourself for dangerous tension.