while i'm not a doctor but being a gymnast in the past i understand the problem
If you have sore wrists from gymnastics i would be saying that it's nota muscular issuein your wrist there is small bones which you have aggravated from years of gymnastics. If you get an xray of your hand/wrist you'd see osteoarthritis in the bones.
The best thing you can do is support your wrists with tape and avoid activities that are hard on the wrists which in thise case would be gymnastic
as i said i'm not a doctor so you might be best to get it checked out