Incline Alternating Dumbbell Fly
In SetGrip: Dumbbell Fly (Incline, Alternating)
Alternating arms on the incline bench means one dumbbell stays extended over your chest while the other travels, so each pec spends half the set holding an isometric while the opposite side works through the arc. It slows the set down and halves the moving load, which is exactly why it suits lifters still learning the fly pattern.
How to do the Incline Alternating Dumbbell Fly
- Set up an incline bench at a 45-degree angle.
- Sit on the bench with your back against the pad and feet flat on the ground.
- Hold a dumbbell in each hand with an overhand grip, palms facing forward.
- Start with your arms fully extended, perpendicular to the ground.
- Lower the dumbbells slowly to the sides of your chest, keeping your elbows at a 90-degree angle.
- Pause for a moment at the bottom, then push the dumbbells back up 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
Frequently asked questions
What muscles does the Incline Alternating Dumbbell Fly work?
The Incline Alternating Dumbbell Fly primarily works the pectorals. It also involves the delts and triceps, which assist the movement and stabilise the joints.
Is the Incline Alternating Dumbbell Fly good for beginners?
Yes. The Incline Alternating Dumbbell Fly is rated beginner: it uses a dumbbell and the movement is simple to learn. Start light, focus on the full range of motion and add load once every rep looks the same.
How many sets and reps should I do?
It depends on your goal. For the Incline Alternating Dumbbell 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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