How to Do Reverse Machine Flyes
Start and end of one clean rep of Reverse Machine Flyes.
Quick facts
| Primary muscle | Shoulders |
|---|---|
| Secondary muscles | — |
| Equipment | Machine |
| Category | Strength |
How to perform Reverse Machine Flyes
- Adjust the handles so that they are fully to the rear. Make an appropriate weight selection and adjust the seat height so the handles are at shoulder level. Grasp the handles with your hands facing inwards. This will be your starting position.
- In a semicircular motion, pull your hands out to your side and back, contracting your rear delts.
- Keep your arms slightly bent throughout the movement, with all of the motion occurring at the shoulder joint.
- Pause at the rear of the movement, and slowly return the weight to the starting position.
Muscles worked
- Shoulders (primary): raises and rotates the arms and drives everything overhead.
Sets & reps by goal
| Goal | Sets × reps | Load | Rest |
|---|---|---|---|
| Strength | 3–5 × 3–5 | Heavy (~85%+) | 2–3 min |
| Hypertrophy | 3–4 × 8–12 | Moderate (~65–75%) | 60–90 s |
| Endurance | 2–3 × 15–20 | Lighter (~50–60%) | 30–45 s |
Pick the row that matches your goal. If you're newer, anchor in the hypertrophy range while you groove the form.
Form tips
- Keep the ribs down and the glutes tight so the lower back doesn't arch to 'help' the weight up.
- Set the seat and pads so the machine's pivot lines up with the joint you're training before your first rep.
- Treat every rep the same — a repeatable setup and bar path is what lets you add weight safely over time.
- Breathe out on the effort and in on the return, keeping one steady rhythm across the set.
Common mistakes
- Pressing with the lower back arched instead of a braced, stacked torso.
- Leaving the seat or range on a setting that forces the joint into an awkward angle.
- Chasing weight jumps before the current load feels solid on every rep.
Frequently asked questions
What muscles does Reverse Machine Flyes work?
Reverse Machine Flyes is a focused movement that primarily works the shoulders.
What equipment do I need for Reverse Machine Flyes?
Reverse Machine Flyes needs the corresponding weight-stack or plate-loaded machine.
How many sets and reps should I do for Reverse Machine Flyes?
It depends on your goal: about 3–5 sets of 3–5 heavy reps for strength, 3–4 sets of 8–12 for muscle growth, or 2–3 sets of 15–20 for endurance. Pick the row that matches your goal. If you're newer, anchor in the hypertrophy range while you groove the form.
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