We already know Leon is flexible, fast, has good core strength and has good moves. Does not make him a gymnast though.
The core strength excercises were basic/level 1 stuff for young athletic guys.

But it's true I can't really see how everything meshes together.
For the moment it feels like a patchwork of anime tropes/fanservice stuff packed with no apparent coherence. A way to try and keep some audience when the core subject feels not enough.
Because the end of carreer of a gymnast from the early 2000 does not feel very attractive for an anime audience.