
BOSU Single-Leg Reach
Glutes, Quads


Legs / Intermediate / Compound (multi-joint)
On one leg, reaching the other foot forward, back and out, and back and across, as far as you can control: hip and ankle stability for running, field sports and trails.
Why it hurts: A stiff leg leaves the work to the hip and trunk, so the ankle and foot stabilisers that prevent sprains are not trained.
✓ Instead: Keep the knee slightly soft and let the foot make small corrections. Wobbling at the ankle is the point.
Why it hurts: Knee valgus on one leg strains the inner knee and is the classic position of ACL injuries in field and court sports.
✓ Instead: Point the knee over the second toe and reach only as far as you can keep it there.
How specific this exercise is to each movement.
Illustration: TVIKY.