My daughter seems to have great upper body strength--she happily does tons of pull-ups, flies up the climbing rope all the way to the ceiling, can rock climb using only her arms as her body just hangs, bar is her best event with early/easy pullovers, etc. Yet when she goes to do a handspring her arms just collapse under her. She also has trouble getting enough power to push off on slow things like walkovers. Does she need more or different arm strength? Any ideas? Thanks!