BOSU Split Squat Over

Target muscles

The lead-leg quadriceps and gluteus maximus produce the squat, with the hamstrings and adductors assisting through the lunge depth. Because the foot sits on the wobbling dome, the gluteus medius and the small stabilisers around the ankle and knee work overtime to keep the joint stacked. It is a genuine unilateral strength movement with a heavy balance tax.

How to perform

Setup

Stand in a split stance with your front foot planted on the centre of the BOSU dome and your rear foot back on the floor, balls of the foot down. Stack your shoulders over your hips and brace your trunk.

Execution

Bend both knees and lower straight down until your front thigh is roughly parallel and the rear knee hovers near the floor. Keep the front shin vertical-ish and the front knee tracking over the second and third toes. Drive through the whole front foot to stand back up, fighting to keep the dome level the entire rep. Finish all reps on one leg, then swap. Move slowly — speed turns the dome into a hazard.

Common mistakes

• Letting the front knee cave inward as the dome tips, which stresses the joint.
• Leaning the torso forward and turning it into a good-morning instead of a squat.
• Pushing off the rear foot rather than driving through the lead leg.
• Bouncing out of the bottom and losing the balance the movement is meant to build.

Progressions and regressions

Regress to a floor split squat or a rear-foot-elevated split squat on stable surfaces until the pattern is solid. Progress by holding dumbbells at your sides, slowing the descent, or pausing at the bottom. Loading it goblet-style in front keeps the torso tall and adds a core demand.

Programming notes

Use it as a lower-body strength or stability builder, 3 sets of 8-10 per leg. Keep load conservative relative to a stable split squat — the unstable base, not the weight, is the training stimulus. It pairs well after a bilateral squat or hinge as unilateral accessory work that exposes side-to-side weaknesses.