Some exercises stay popular because they work. The classic “Jane Fonda” style of hip training—side-lying leg lifts, controlled taps, and small-range movements—can build meaningful endurance through the lateral hip when performed with good control. The toe-tap variations demonstrated by Dr. Joe add a coordination challenge: the working leg moves while the pelvis and trunk stay as quiet as possible. That makes the exercise useful for more than simply “feeling the burn.” It can