📸 Proper Execution Form
what is this exercise?
Chest fly (Eng. chest fly / dumbbell flyes) is an isolation exercise that creates a unique stimulus by stretching and contracting the chest muscles. Unlike presses, flyes place more emphasis on muscle shape and the stretch phase. Use a lighter weight — technique is everything.
📋 Step by Step
Lie on a bench with dumbbells in your hands, extended above your chest — palms facing each other.
Slightly bend your elbows (15-20°) and lock this position — the elbow angle does not change throughout the exercise.
Begin slowly opening your arms to the sides — the movement comes from the shoulders, not the elbows.
Let the dumbbells lower until you feel a deep stretch in your chest — your arms are approximately at shoulder height.
Squeeze your chest muscles and bring the dumbbells back — imagine hugging a large tree.
At the top, squeeze your chest for 1 second, but do not let the dumbbells touch.
💪 Muscle Activation
| Muscle | Activation Level |
|---|---|
| Pectoralis major muscle (pectoralis major) | ★★★★★ |
| Pectoralis minor muscle (pectoralis minor) | ★★★☆☆ |
| Anterior deltoid muscle (anterior deltoid) | ★★★☆☆ |
| Biceps brachii muscle (biceps brachii) | ★★☆☆☆ |
⚠️ Most Common Mistakes
✅ Use light dumbbells — too much weight forces the arms straight and endangers the shoulders.
✅ This turns the exercise into a press — the elbows should be only slightly bent.
✅ The dumbbells should not drop below the shoulders — this stretches the shoulder joints too much.
✅ Slow, controlled movement — 2-3 sec. down, 1-2 sec. up.
🔄 Variations
| Variation | Description |
|---|---|
| Easier Pec Deck machine | Seated position, fixed path — easier to control. |
| Harder Cable fly (cable fly) | Cables create constant tension throughout the range of motion. |
| Harder Incline bench flyes | Emphasis on the upper chest. |
| Harder Floor flyes | Limited lowering — safer for the shoulders, different stimulus. |