Squat on the dome with a stability ball pinned overhead.
Keep your chest lifted and the ball over your shoulders to stay balanced on the dome.
Squatting on the dome while pinning a stability ball overhead loads your quads through the descent and stand while your arms hold a position that shifts your balance point way up high. Your glutes drive the hips and help keep you centred as the raised ball magnifies every wobble. It earns a place for building squat posture and total-body control, since the overhead position instantly exposes a collapsing chest or drifting weight.
The overhead position raises your centre of mass and forces an upright torso. Any forward lean sends the ball drifting, so you get instant feedback on your squat posture that a normal dome squat never gives.
The ball is light and large, which makes it about position, not load. It teaches the overhead squat shape on an unstable surface without the risk of dropping something heavy while you wobble.
Usually tight shoulders or a chest that drops as you descend. Keep the ribs down, chest lifted and squat only as deep as the ball stays stacked over your shoulders.
