TETSUBarbell Guillotine Bench Press vs Cable Fly
The Barbell Guillotine Bench Press and the Cable Fly both train the pectorals as their primary muscle. The Barbell Guillotine Bench Press uses a barbell while the Cable Fly uses a cable. Here is how they compare and when to pick each.
Side-by-side comparison
| Barbell Guillotine Bench Press | Cable Fly | |
|---|---|---|
| Primary muscle | pectorals | pectorals |
| Body part | chest | pectorals |
| Supporting muscles | shoulders and triceps | — |
| Equipment | barbell | cable |
| Steps in our guide | 6 | 6 |
How each one starts
Barbell Guillotine Bench Press — first steps
- Lie flat on a bench with your feet flat on the ground and your back pressed against the bench.
- Grasp the barbell with an overhand grip, slightly wider than shoulder-width apart.
Cable Fly — first steps
- Set both pulleys to chest height and choose a light to moderate weight.
- Hold a handle in each hand and step forward into a staggered stance.
Full step-by-step guides are linked below.
Which should you choose?
The Barbell Guillotine Bench Press lets you load the heaviest weights and progress in small, steady jumps. The Cable Fly keeps constant tension on the muscle through the whole range of motion. 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 Barbell Guillotine Bench Press better than the Cable Fly?
Neither is universally better — both train the pectorals as the primary mover. The Barbell Guillotine Bench Press lets you load the heaviest weights and progress in small, steady jumps, while the Cable Fly keeps constant tension on the muscle through the whole range of motion. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Barbell Guillotine Bench Press and the Cable 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 Barbell Guillotine Bench Press and the Cable Fly work the same muscles?
The primary muscle is the same: the pectorals. Supporting muscles differ slightly — shoulders and triceps for the Barbell Guillotine Bench Press versus minimal assistance for the Cable 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.