TETSUAssisted Wide-Grip Chest Dip (Kneeling) vs Dumbbell Fly
The Assisted Wide-Grip Chest Dip (Kneeling) and the Dumbbell Fly both train the pectorals as their primary muscle. The Assisted Wide-Grip Chest Dip (Kneeling) uses a machine while the Dumbbell Fly uses a dumbbell. Here is how they compare and when to pick each.
Side-by-side comparison
| Assisted Wide-Grip Chest Dip (Kneeling) | Dumbbell Fly | |
|---|---|---|
| Primary muscle | pectorals | pectorals |
| Body part | chest | chest |
| Supporting muscles | triceps and shoulders | shoulders |
| Equipment | machine | dumbbell |
| Steps in our guide | 5 | 5 |
How each one starts
Assisted Wide-Grip Chest Dip (Kneeling) — first steps
- Adjust the machine to your desired height and secure your knees on the pad.
- Grasp the handles with a wide grip and keep your elbows slightly bent.
Dumbbell Fly — first steps
- Lie flat on a bench with a dumbbell in each hand, palms facing each other.
- Extend your arms straight up over your chest, with a slight bend in your elbows.
Full step-by-step guides are linked below.
Which should you choose?
The Assisted Wide-Grip Chest Dip (Kneeling) fixes the movement path so you can push close to failure with less skill demand. The Dumbbell Fly works each side independently and demands more stabilizer control. 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 pectorals adapting.
Full form guides
Common questions
Is the Assisted Wide-Grip Chest Dip (Kneeling) better than the Dumbbell Fly?
Neither is universally better — both train the pectorals as the primary mover. The Assisted Wide-Grip Chest Dip (Kneeling) fixes the movement path so you can push close to failure with less skill demand, while the Dumbbell Fly works each side independently and demands more stabilizer control. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Assisted Wide-Grip Chest Dip (Kneeling) and the Dumbbell Fly in the same program?
Yes, but usually not in the same session — they overlap heavily on the pectorals. 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 Wide-Grip Chest Dip (Kneeling) and the Dumbbell Fly work the same muscles?
The primary muscle is the same: the pectorals. Supporting muscles differ slightly — triceps and shoulders for the Assisted Wide-Grip Chest Dip (Kneeling) versus shoulders for the Dumbbell Fly.
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.