Exercise
Reverse Machine Flyes: How to Do It, Muscles Worked
The Reverse Machine Flyes is a beginner-level strength exercise that primarily works the shoulders. It uses machine, and is performed in 4 steps, following the form cues, common mistakes and sets/reps guidance below.
What muscles does the Reverse Machine Flyes work?
The Reverse Machine Flyes primarily targets the shoulders, with no listed secondary muscles in the dataset. It's classified as a beginner-level strength movement using machine.
What are the most common Reverse Machine Flyes mistakes?
- Letting the shoulders roll forward instead of keeping the chest up through the movement.
- Bending the elbows into a press instead of keeping a fixed, slight elbow bend through the arc.
- Using a weight heavy enough that the shoulder joint — not the chest — ends up limiting the set.
- Cutting the stretch short at the bottom instead of feeling a full stretch across the chest.
How should I program the Reverse Machine Flyes — sets, reps and frequency?
As a single-joint isolation exercise, it responds well to a higher 10-15 reps for 2-4 sets, usually taken close to muscular failure. It tolerates higher frequency than a heavy compound lift — twice a week for the same muscle group is common. Add small amounts of weight or an extra rep once every working set can be completed with good form — the same progressive overload principle behind every strength exercise in the library.
What are good Reverse Machine Flyes variations and alternatives?
- Leverage Shoulder Press — machine, beginner level, shoulders
- Reverse Flyes — dumbbell, beginner level, shoulders
- Arnold Dumbbell Press — dumbbell, intermediate level, shoulders
- Barbell Shoulder Press — barbell, intermediate level, shoulders
| Attribute | Value |
|---|---|
| Level | Beginner |
| Equipment | Machine |
| Category | Strength |
| Primary muscles | Shoulders |
| Secondary muscles | — |
How to do the Reverse Machine Flyes, step by step:
- Step 1. 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.
- Step 2. In a semicircular motion, pull your hands out to your side and back, contracting your rear delts.
- Step 3. Keep your arms slightly bent throughout the movement, with all of the motion occurring at the shoulder joint.
- Step 4. Pause at the rear of the movement, and slowly return the weight to the starting position.
Key takeaways
- The Reverse Machine Flyes is a beginner-level strength exercise using machine.
- Primary muscles worked: Shoulders.
- A typical working range is 10-15 reps for 2-4 sets, usually taken close to muscular failure.
- The most common technical fault is letting the shoulders roll forward instead of keeping the chest up through the movement.
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Is the Reverse Machine Flyes suitable for beginners?
Yes — the dataset lists the Reverse Machine Flyes as a beginner-level movement, though anyone new to training should still start with light weight (or no added weight) to learn the pattern first.
What equipment do I need for the Reverse Machine Flyes?
A machine. No other equipment is required for the standard version of this movement.
What's the difference between the primary and secondary muscles listed?
Primary muscles (Shoulders) do most of the work and are usually the limiting factor in the set. Secondary muscles assist or stabilize but aren't the main driver of the movement.