TETSUAssisted Motion Russian Twist vs Dead Bug
The Assisted Motion Russian Twist and the Dead Bug both train the abs as their primary muscle. The Assisted Motion Russian Twist uses a medicine ball while the Dead Bug is bodyweight-only. Here is how they compare and when to pick each.
Side-by-side comparison
| Assisted Motion Russian Twist | Dead Bug | |
|---|---|---|
| Primary muscle | abs | abs |
| Body part | waist | waist |
| Supporting muscles | obliques and lower back | hip flexors and lower back |
| Equipment | medicine ball | bodyweight |
| Steps in our guide | 6 | 7 |
How each one starts
Assisted Motion Russian Twist — first steps
- Sit on the ground with your knees bent and feet flat on the floor.
- Hold the medicine ball with both hands in front of your chest.
Dead Bug — first steps
- Lie flat on your back with your arms extended towards the ceiling.
- Bend your knees and lift your legs off the ground, creating a 90-degree angle at your hips and knees.
Full step-by-step guides are linked below.
Which should you choose?
The Assisted Motion Russian Twist suits explosive, power-focused reps. The Dead Bug 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 abs adapting.
Full form guides
Common questions
Is the Assisted Motion Russian Twist better than the Dead Bug?
Neither is universally better — both train the abs as the primary mover. The Assisted Motion Russian Twist suits explosive, power-focused reps, while the Dead Bug 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 Assisted Motion Russian Twist and the Dead Bug 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 Motion Russian Twist and the Dead Bug work the same muscles?
The primary muscle is the same: the abs. Supporting muscles differ slightly — obliques and lower back for the Assisted Motion Russian Twist versus hip flexors and lower back for the Dead Bug.
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.