Tiny move, big glute medius activation.
Keep your hips stacked and don't let your top hip roll backward.
The clam targets your hip abductors, chiefly the glute medius, the muscle that keeps your pelvis level and your knees tracking straight. Rotating the top knee open while your feet stay stacked isolates that abduction without letting bigger muscles take over, one side at a time. It looks tiny, but it underpins knee health for runners, lifters and anyone whose knees cave during a squat.
Strengthening the hip abductors on the side of your hip. Weakness there shows up as knees caving during squats and running, which is why it is a staple in warm-ups and rehab programmes alike.
You are probably rolling your top hip backward to fake a bigger range. Stack your hips, shrink the range and move slowly. The burn arrives fast once the form is honest.
Once bodyweight sets feel easy, a mini band above the knees is the natural progression. Keep the same strict hip position, the band just makes the top of the movement harder.
