Recently got H1, and it's definitely great material.
Bumped into HS/PE2>iM, which I didn't master, and it revealed that my shoulders (specifically pecs and anterior deltoids?) are pretty tight. No surprises there.
When I perform "air"-transitions of the muscle-up, i.e. standing on the floor just performing the transition motion, but not actually holding rings or a bar in my hands, I can feel the same tightness when trying to move the upper arms from the vertical position (end of pull-up), to the horizontal position (beginning of dip).
This means that in addition to lifting my own weight when doing muscle-ups, I'm also fighting my own inflexibility.
Wouldn't it then be logical to assume that improving flexibility in this area, by mastering HS/PE2>iM and beyond, wil make muscle-ups easier? Would seem like a relatively easy way to increase the reps in muscle-ups.
Any thoughts?