Squat (Box, With Chains) - Barbell

Set up box squat (box behind, bar on back).

Attach chains securely to barbell sleeves.

Ensure some chain rests on floor at top position.

Perform box squat: push hips back, lower onto box, pause.

Drive explosively off box. Resistance increases as more chain lifts off floor.

Return to start. Repeat. Focus on accelerating through lift.