For anyone that owns pets… especially a cat or dog… try this out
The “hip flexors” are the muscles near the front of the thighs and hips that help bring your knees UP toward your torso (and often tight from sitting).
Pike compression is the ability to bring your legs up (toward your face). Improving this quality is crucial for many bodyweight exercises and often a major weak point for many.
My attempt at organizing the content of all the prominent movement/mobility/flexibility experts all in one place!
Four guides to increase hamstring flexibility, from beginners to advanced, by Antranik, Emmet Louis and Zack Finer