POSSIBLE FAILURE:
OBJECTIVE>
Core stability
Pelvis and hip stability
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Place the ball on your thigh against the wall.
Stand on your outside leg. Your toes should point forward
Raise your inside leg and flex your ankle (toes up).
Pull back your raised leg's heel.
Square your pelvis (or the outside hip can be a little bit front)
1. Lower your body until you can hold the balance.
2. Extend your legs
The main purpose is not a deep bending of the knee, moreover looking for a stable stance on the outside leg and preventing a valgus (X) rotation of the femur.
Outside thigh rotated in (valgus X stance)
The outside leg's foot rotated out
Swiss Ball
EQUIPMENT: