Barbell Rollout Fly
Also known as: barbell chest rollout
Lying on the floor turns the fly into a fixed-range movement: the ground stops your arms at the bottom, a built-in depth limit that bench-based dumbbell flies do not have. A single barbell is also harder to steer through the arc than two dumbbells, so keep the load light and the tempo slow.
How to do the Barbell Rollout Fly
- Lie flat on your back on the floor with your knees bent and feet flat on the ground.
- Hold a barbell with an overhand grip, arms extended straight up over your chest.
- Slowly lower the barbell out to the sides, keeping a slight bend in your elbows.
- Lower the barbell until your arms are parallel to the floor, feeling a stretch in your chest.
- Pause for a moment, then squeeze your chest muscles to bring the barbell back to the starting position.
- Repeat for the desired number of repetitions.
Tip: Imagine hugging a barrel rather than pushing a weight.
Muscles worked
Primary
Pectorals · Chest
On chest flies and cable crossovers the pecs pull the arms together in an arc and should feel a deep stretch at the bottom and a hard squeeze at the top.
Common mistakes
- Elbows bending as you tire — this turns a fly into a press; set the elbow angle at the start and keep it constant for the whole set.
- Going too heavy — flies are a stretch and squeeze movement, not a strength lift; you should be able to pause at the bottom without the shoulders rolling forward.
- Stopping short of the stretch — let the arms open until you feel the chest or rear delts lengthen, then bring them back under control.
- Not squeezing at the finish — the last few inches are where the muscle shortens most, so hold the contraction for a count before opening again.
Sets, reps and where it fits
| Goal | Sets × reps | Rest |
|---|---|---|
| Muscle growth | 3–4 × 10–15 | 60–90 s |
| Endurance / finisher | 2–3 × 15–20 | 45 s |
| Strength | Not ideal — pick a compound lift for the same muscle | — |
Flies are an isolation movement for after the pressing or rowing is done. Pair a cable crossover with a cable rear delt fly on the same station, or dumbbell chest flies with dumbbell rear delt flies on the same bench.
Variations and alternatives
Similar exercises
Without barbell
Frequently asked questions
What muscles does the Barbell Rollout Fly work?
The Barbell Rollout Fly primarily works the pectorals. It also involves the delts and triceps, which assist the movement and stabilise the joints.
Is the Barbell Rollout Fly good for beginners?
It is rated intermediate, so it suits people who already train regularly. Beginners can still do the Barbell Rollout Fly with light load and a spotter or coach watching the first few sessions; if it feels awkward, pick an easier variation from the alternatives below first.
What can I do instead of the Barbell Rollout Fly?
If you cannot do the Barbell Rollout Fly, try the Incline Single Arm Dumbbell Fly, the Incline Cable Fly or the Low to High Cable Fly. Each of them trains the pectorals through a similar movement, so you can swap them in without changing the rest of the workout.
How many sets and reps should I do?
It depends on your goal. For the Barbell Rollout Fly, a sensible starting point is muscle growth: 3–4 × 10–15 with 60–90 s rest; endurance / finisher: 2–3 × 15–20 with 45 s rest. Do it after your compound lifts. It is a finishing movement, not the main event.
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