Fix tight ankles
Tight, immobile ankles can cause all types of problems including knee, back and neck pain. If your joints aren’t fluid and mobile chances are something else is compensating or taking the strain. If your ankles are stiff it’s possible your gait is a bit awkward and common sense would suggest awkward, jerky movement is harder on knees than fluid, graceful movements. If you squat down with tight ankles can you be sure your knees, hips and back are in their optimal position for your unique geometry, or are they moving where your tight ankles force them?
Try squatting down while holding the handles on your suspension trainer and gently press on your thigh near the knee with one forearm. This will help loosen your ankles.