To progressively load your hip flexors *dynamically* at length, this set up is key Anchor the non-target foot on the wall, and progressively add more weight via the kettlebell with partial ROM contractions to really challenge the hip flexors at length We can add more length in this specific case above by raising the level of the surface we are laying on to let the hip extend even more Want to learn more targeted ways of loading the musculoskeletal system, with focus on assessment & rehab process