TETSUAssisted Sit-Up vs Hanging Oblique Knee Raise
The Assisted Sit-Up and the Hanging Oblique Knee Raise both train the abs as their primary muscle. The Assisted Sit-Up is an assisted movement while the Hanging Oblique Knee Raise is bodyweight-based (a bar, rings or a station). Here is how they compare and when to pick each.
Side-by-side comparison
| Assisted Sit-Up | Hanging Oblique Knee Raise | |
|---|---|---|
| Primary muscle | abs | abs |
| Body part | waist | waist |
| Supporting muscles | hip flexors | obliques |
| Equipment | assisted | bodyweight |
| Steps in our guide | 6 | 5 |
How each one starts
Assisted Sit-Up — first steps
- Sit on the edge of a bench or have someone hold your feet down.
- Lie flat on your back with your knees bent and feet flat on the ground.
Hanging Oblique Knee Raise — first steps
- Hang from a pull-up bar with your arms fully extended and your palms facing away from you.
- Engage your core and lift your knees towards your chest, twisting your torso to the side as you do so.
Full step-by-step guides are linked below.
Which should you choose?
The Assisted Sit-Up reduces the load so you can own the movement before going unassisted. The Hanging Oblique Knee Raise needs only a sturdy bar, rings or a station 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 abs adapting.
Full form guides
Common questions
Is the Assisted Sit-Up better than the Hanging Oblique Knee Raise?
Neither is universally better — both train the abs as the primary mover. The Assisted Sit-Up reduces the load so you can own the movement before going unassisted, while the Hanging Oblique Knee Raise needs only a sturdy bar, rings or a station and scales through leverage, tempo and reps. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Assisted Sit-Up and the Hanging Oblique Knee Raise 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 Assisted Sit-Up and the Hanging Oblique Knee Raise work the same muscles?
The primary muscle is the same: the abs. Supporting muscles differ slightly — hip flexors for the Assisted Sit-Up versus obliques for the Hanging Oblique Knee Raise.
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.