TETSUBottoms-Up vs Weighted Overhead Crunch (On Stability Ball)
The Bottoms-Up and the Weighted Overhead Crunch (On Stability Ball) both train the abs as their primary muscle. The Bottoms-Up is bodyweight-only while the Weighted Overhead Crunch (On Stability Ball) adds external weight to a bodyweight pattern. Here is how they compare and when to pick each.
Side-by-side comparison
| Bottoms-Up | Weighted Overhead Crunch (On Stability Ball) | |
|---|---|---|
| Primary muscle | abs | abs |
| Body part | waist | waist |
| Supporting muscles | obliques and hip flexors | obliques and lower back |
| Equipment | bodyweight | added weight |
| Steps in our guide | 5 | 5 |
How each one starts
Bottoms-Up — first steps
- Lie flat on your back with your legs extended and your arms by your sides.
- Bend your knees and bring them towards your chest, keeping your feet off the ground.
Weighted Overhead Crunch (On Stability Ball) — first steps
- Sit on a stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
- Hold a weight plate or dumbbell with both hands and extend your arms overhead.
Full step-by-step guides are linked below.
Which should you choose?
The Bottoms-Up needs no equipment and scales through leverage, tempo and reps. The Weighted Overhead Crunch (On Stability Ball) adds external load to a bodyweight pattern for direct overload. 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 abs adapting.
Full form guides
Common questions
Is the Bottoms-Up better than the Weighted Overhead Crunch (On Stability Ball)?
Neither is universally better — both train the abs as the primary mover. The Bottoms-Up needs no equipment and scales through leverage, tempo and reps, while the Weighted Overhead Crunch (On Stability Ball) adds external load to a bodyweight pattern for direct overload. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Bottoms-Up and the Weighted Overhead Crunch (On Stability Ball) in the same program?
Yes, but usually not in the same session — they overlap heavily on the abs. 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 Bottoms-Up and the Weighted Overhead Crunch (On Stability Ball) work the same muscles?
The primary muscle is the same: the abs. Supporting muscles differ slightly — obliques and hip flexors for the Bottoms-Up versus obliques and lower back for the Weighted Overhead Crunch (On Stability Ball).
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.