TETSUBosu Ball Squat vs Sissy Squat
The Bosu Ball Squat and the Sissy Squat both train the quads as their primary muscle. The Bosu Ball Squat uses a bosu ball while the Sissy Squat is bodyweight-only. Here is how they compare and when to pick each.
Side-by-side comparison
| Bosu Ball Squat | Sissy Squat | |
|---|---|---|
| Primary muscle | quads | quads |
| Body part | upper legs | upper legs |
| Supporting muscles | glutes, hamstrings and calves | calves and glutes |
| Equipment | bosu ball | bodyweight |
| Steps in our guide | 7 | 6 |
How each one starts
Bosu Ball Squat — first steps
- Place the bosu ball on the ground with the flat side up.
- Stand with your feet shoulder-width apart and position yourself on top of the bosu ball.
Sissy Squat — first steps
- Stand with your feet shoulder-width apart and your toes pointing slightly outward.
- Hold onto a stable object for balance if needed.
Full step-by-step guides are linked below.
Which should you choose?
The Bosu Ball Squat adds an unstable surface that raises core demand. The Sissy Squat needs no equipment and scales through leverage, tempo and reps. If your gym has both options, neither is a wrong choice: pick the one that feels strongest through a full range, and swap after 6 to 8 weeks to keep the quads adapting.
Full form guides
Common questions
Is the Bosu Ball Squat better than the Sissy Squat?
Neither is universally better — both train the quads as the primary mover. The Bosu Ball Squat adds an unstable surface that raises core demand, while the Sissy Squat needs no equipment and scales through leverage, tempo and reps. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Bosu Ball Squat and the Sissy Squat in the same program?
Yes, but usually not in the same session — they overlap heavily on the quads. A common setup is one as your main movement and the other on a second training day, or alternating them block by block.
Do the Bosu Ball Squat and the Sissy Squat work the same muscles?
The primary muscle is the same: the quads. Supporting muscles differ slightly — glutes, hamstrings and calves for the Bosu Ball Squat versus calves and glutes for the Sissy Squat.
Track it in Tetsu
Tetsu tracks both movements separately, keeps your PRs per exercise, and tells you which one is actually progressing. Free to start.