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Strength Training · Bodybuilding

Decline Dumbbell Chest Fly

The decline dumbbell chest fly trains your chest, with an emphasis on its lower portion, by moving the weights through a wide arc while you lie on a downward-sloping bench.

  • Intermediate
  • Isolation
  • Moderate injury risk
  • Rest 1 min
Video by Mike O'Hearn on YouTube

How to do it

  1. Secure your legs under the decline bench's support pads.
  2. Lie back with your head, upper back, and hips supported.
  3. Receive the dumbbells from a helper at the sides of your chest.
  4. Position the dumbbells above your lower chest with palms facing each other, elbows slightly bent.
  5. Lower the weights out to your sides in a wide arc until your upper arms are roughly level with your torso.
  6. Sweep the dumbbells back over your lower chest along the same arc.

Form cues

  • Keep your elbow angle steady.
  • Keep your shoulder blades against the bench.
  • Stack your wrists over your forearms.
  • Exhale as the weights come together.

Common mistakes

  • Chasing a deeper stretchShorten the lowering range if the front of your shoulders pulls or your shoulders roll forward.
  • Turning the fly into a pressUse lighter weights if you must bend your elbows more to bring the dumbbells back up.
  • Bouncing out of the bottomLower for about two seconds, reversing direction smoothly without a rebound.

Safety

Heavy weights or an uncontrolled stretch can strain the chest or front of the shoulder. Handling dumbbells while declined also creates a risk of dropping them or losing your position.

  • Use a shallow decline of about 10–20 degrees with the bench adjustment locked.
  • Finish each set before fatigue prevents you from controlling the full arc.
  • Have your helper take both dumbbells before you sit up.
  • Stop if you feel sharp pain or dizziness.

Choose a flat or machine version if the decline causes discomfort, and seek professional advice first if you have ongoing shoulder pain or recurrent dizziness.

Muscles worked

Front

Primary muscles

  • Chest

Secondary muscles

  • Front Delts

Equipment

  • Decline Bench
  • Dumbbell

Sets and reps

Sets
2–3
Target
10–15 reps
Rest
1 min

Start with substantially less weight than you use for a dumbbell chest press.

Variations

Easier