Strengthen and expand your hip abduction end range with PAILs and RAILs in a deep frog position — a powerful isometric drill that loads the hip abductors and adductors at their absolute limit, building genuine strength and tissue resilience in one of the deepest and most demanding positions available to the hip.

Starting in a deep frog base with both knees wide and the hips fully loaded into abduction, you settle into the passive stretch and allow the tissues to accept the position before any contraction begins. This is true end range — no backing out, no reducing the load. The full depth of the frog position is the starting point. From here, the drill moves through two distinct isometric phases: for PAILs, drive both knees firmly down into the floor while simultaneously attempting to slide them toward each other — contracting the adductors and hip flexors under maximum stretch. For RAILs, attempt to lift both knees off the floor and spread them further apart — driving the hips into deeper abduction using the abductors and posterior hip tissue.

PAILs (Progressive Angular Isometric Loading) contract the adductors and inner thigh tissue — the muscles being stretched at abduction end range — pressing the knees down and attempting to close the gap between them. This builds tensile strength and tissue resilience directly through the lengthened tissue, signalling to the nervous system that this wide, loaded position is safe and strong. RAILs (Regressive Angular Isometric Loading) then fire the hip abductors — glute medius, glute minimus, and deep hip external rotators — attempting to lift and spread the knees further apart and drive the hips deeper into abduction range. Together, these contractions create a powerful neurological and structural adaptation at the hip's abduction end range, converting a position of passive limitation into one of active strength and control.

Expect deep, intense effort through the inner thighs and groin during PAILs as the adductors contract hard against the floor. During RAILs, expect a strong, burning contraction through the outer hips and glutes as the abductors attempt to spread and lift the knees further apart. Build each contraction gradually — starting at around 20 percent effort and building toward near maximum — never forcing the joint. The frog position should remain completely still throughout both phases. No rocking, no shifting, no momentum. Over time, this drill permanently expands hip abduction range and builds the deep hip strength needed for better squatting depth, lateral athletic performance, and long-term hip health.