I Fly (TRX / Suspension Trainer)
An isolation exercise for shoulder extension and rear deltoid development using suspension trainer straps. Targets the upper back and posterior shoulders.
Instructions
- Stand facing the TRX anchor point with feet hip-width apart
- Hold the handles with arms extended at shoulder height, creating an I shape with your body
- Lean forward slightly, maintaining a straight body line
- Pull your body forward by retracting your shoulder blades and driving your elbows back
- Bring your chest toward the anchor point while keeping your arms nearly straight
- Pause briefly, feeling the contraction in your rear delts and upper back
- Extend your arms to return to the starting position
- Repeat for the prescribed number of reps
Tips
- Maintain a straight body position throughout the movement
- The movement is driven by shoulder retraction, not arm bending
- Keep a slight bend in your elbows; this isn’t a completely rigid-arm movement
- Adjust difficulty by changing your body angle relative to the anchor point
- Lean further forward for increased difficulty
- Feel the squeeze in your rear deltoids and middle back
- Avoid using your lower body or momentum to assist the pull
Recommended starting values
Sensible novice starting points for each goal, for a lifter aged 25–40. Scale down for smaller frames or older lifters. Treat the first set of any session as a discovery set.
| Goal | Sets | Reps |
|---|---|---|
| Gain strength | 3 | 9 reps |
| Build muscle | 3 | 13 reps |
| Build endurance | 3 | 16 reps |
Alternatives
Exercises that target the same muscles with the same force and mechanic.
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