03/13/2026
Pain during running, squats, or lunges isn’t always a mobility problem.
As a Doctor of Physical Therapy, I see this constantly in active adults and athletes.
Most people assume their knee hurts because something is tight.
So they stretch their hamstrings, quads, or calves.
But often the real issue is single-leg stability.
When the hip and glutes can’t control the pelvis during movement, the knee absorbs the extra load.
Exercises like this single-leg reach with knee drive challenge your body to stabilize the hip, control rotation, and keep the knee aligned under load.
If the movement feels shaky, that’s useful information.
Train control before chasing flexibility.
This is something we evaluate regularly in physical therapy when someone has knee or running-related pain.
Save this for later.