BrickGirl,
How do you manage to train your upper body together with the gymnastics? How many days do you rest between those two workouts? I've been having difficulty arranging that because I still need some delt development and when I get to do gymnastics, I'm tired of that muscle.
Fitgrl,
>What kind of training do you do for press holds, jumps, >flexibility,etc...?
For press holds I've found (together with my trainer) that you must have a strong upper body... also upper quads are involved and strong abs. Your gym training should be guided towards what you are most weak. And as BrickGirl mentions, practice and more practice.
For jumps, are you currently doing any gymnastic training?