TETSU3/4 Sit-Up vs Band Kneeling Twisting Crunch
The 3/4 Sit-Up and the Band Kneeling Twisting Crunch both train the abs as their primary muscle. The 3/4 Sit-Up is bodyweight-only while the Band Kneeling Twisting Crunch uses a band. Here is how they compare and when to pick each.
Side-by-side comparison
| 3/4 Sit-Up | Band Kneeling Twisting Crunch | |
|---|---|---|
| Primary muscle | abs | abs |
| Body part | waist | waist |
| Supporting muscles | hip flexors and lower back | obliques |
| Equipment | bodyweight | band |
| Steps in our guide | 5 | 6 |
How each one starts
3/4 Sit-Up — first steps
- Lie flat on your back with your knees bent and feet flat on the ground.
- Place your hands behind your head with your elbows pointing outwards.
Band Kneeling Twisting Crunch — first steps
- Attach the band to a sturdy anchor point at waist height.
- Kneel down facing away from the anchor point and hold the band with both hands, keeping your elbows bent and close to your sides.
Full step-by-step guides are linked below.
Which should you choose?
The 3/4 Sit-Up needs no equipment and scales through leverage, tempo and reps. The Band Kneeling Twisting Crunch gives accommodating resistance that peaks at the top of the range. 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 3/4 Sit-Up better than the Band Kneeling Twisting Crunch?
Neither is universally better — both train the abs as the primary mover. The 3/4 Sit-Up needs no equipment and scales through leverage, tempo and reps, while the Band Kneeling Twisting Crunch gives accommodating resistance that peaks at the top of the range. Choose based on your equipment and which movement you can progress consistently.
Can I do both the 3/4 Sit-Up and the Band Kneeling Twisting Crunch 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 3/4 Sit-Up and the Band Kneeling Twisting Crunch work the same muscles?
The primary muscle is the same: the abs. Supporting muscles differ slightly — hip flexors and lower back for the 3/4 Sit-Up versus obliques for the Band Kneeling Twisting Crunch.
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.