TETSU3/4 Sit-Up vs Band Bicycle Crunch
The 3/4 Sit-Up and the Band Bicycle Crunch both train the abs as their primary muscle. The 3/4 Sit-Up is bodyweight-only while the Band Bicycle Crunch uses a band. Here is how they compare and when to pick each.
Side-by-side comparison
| 3/4 Sit-Up | Band Bicycle Crunch | |
|---|---|---|
| Primary muscle | abs | abs |
| Body part | waist | waist |
| Supporting muscles | hip flexors and lower back | hip flexors and obliques |
| Equipment | bodyweight | band |
| Steps in our guide | 5 | 5 |
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 Bicycle Crunch — first steps
- Lie flat on your back with your hands behind your head and your knees bent.
- Lift your feet off the ground and bring your right knee towards your chest while simultaneously twisting your torso to bring your left elbow towards your right knee.
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 Bicycle 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 Bicycle 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 Bicycle 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 Bicycle 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 Bicycle 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 hip flexors and obliques for the Band Bicycle 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.