Dumbbell Fly (knees at 90 degrees)

Sculpt your chest with the dumbbell fly, performed lying on your back with knees bent.

IntermediateChest Dumbbell

Movement: Isolation
Force: Push
Per set: 1 min
Rest: 2 min

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Variations of Dumbbell Fly (knees at 90 degrees)

Isolation

Hyght Dumbbell Fly

Chest · Pectoralis Major Clavicular Head · Dumbbell

Intermediate

Isolation

Dumbbell Fly

Chest · Pectoralis Major Clavicular Head · Dumbbell

Intermediate

Isolation

Dumbbell Decline Twist Fly

Chest · Pectoralis Major Sternal Head · Dumbbell

Intermediate

Isolation

Dumbbell Decline Fly

Chest · Pectoralis Major Sternal Head · Dumbbell

Intermediate

Description

A dumbbell fly is an exercise for the upper body. In this variation, the person lies on their back with their knees at a 90-degree angle and uses dumbbells to extend their arms wide and bring them together above the chest.

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How to do Dumbbell Fly (knees at 90 degrees)

01
Setup
Lie supine on a flat bench with your feet flat on the floor and knees bent at 90 degrees. Hold a dumbbell in each hand with a neutral grip, palms facing each other, and rest them on your thighs.
02
Setup
Carefully kick the dumbbells up to position them above your chest, arms extended but with a slight bend in your elbows, palms still facing each another. Ensure your shoulders are retracted and pressed into the bench.
03
Inhale deeply and slowly lower the dumbbells out to your sides in a wide arc, keeping the slight bend in your elbows constant. Feel a stretch across your chest as the dumbbells reach approximately shoulder level or slightly below.
04
Exhale and contract your chest muscles to reverse the movement, bringing the dumbbells back up in the same wide arc until they are above your chest. Maintain control throughout the entire movement, avoiding momentum.

Tips

Maintain a slight, consistent bend in your elbows throughout the entire movement to protect your elbow joints and focus the tension on your chest.
Focus on squeezing your pectoralis muscles at the top of the movement, imagining you're hugging a barrel to maximize muscle activation.
Control the eccentric (lowering) phase, taking 2-3 seconds to lower the dumbbells to maximize time under tension and enhance muscle growth.
Keep your lower back pressed gently into the bench by engaging your core; avoid arching your back excessively as you lower the weights.

Common mistakes

Bending elbows too much or straightening them completely shifts tension away from the chest and can injure your joints; keep a consistent, slight bend in your elbows to protect the joint and maintain tension on the chest.
Using momentum to lift the weights reduces muscle engagement and effectiveness; control both the lowering and lifting phases, focusing on a slow, deliberate contraction of the chest muscles.
Arching the lower back excessively can lead to spinal strain; engage your core and gently press your lower back into the bench to maintain spinal stability and prevent injury.

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Questions

What muscles does Dumbbell Fly (knees at 90 degrees) work?

Dumbbell Fly (knees at 90 degrees) primarily targets Pectoralis Major Clavicular Head, Pectoralis Major Sternal Head. Secondary muscles include Biceps Brachii, Deltoid Anterior.

Is Dumbbell Fly (knees at 90 degrees) good for beginners?

Dumbbell Fly (knees at 90 degrees) is rated intermediate. Beginners can still attempt it with lighter weight and careful form, but it's best to master easier variations first.

What equipment do I need for Dumbbell Fly (knees at 90 degrees)?

You need Dumbbell to perform Dumbbell Fly (knees at 90 degrees). If you don't have this equipment, look for variations that target the same muscles with what you have available.

What are the best tips for Dumbbell Fly (knees at 90 degrees)?

Maintain a slight, consistent bend in your elbows throughout the entire movement to protect your elbow joints and focus the tension on your chest. Focus on squeezing your pectoralis muscles at the top of the movement, imagining you're hugging a barrel to maximize muscle activation. Control the eccentric (lowering) phase, taking 2-3 seconds to lower the dumbbells to maximize time under tension and enhance muscle growth. Keep your lower back pressed gently into the bench by engaging your core; avoid arching your back excessively as you lower the weights.

What are common mistakes when doing Dumbbell Fly (knees at 90 degrees)?

Bending elbows too much or straightening them completely shifts tension away from the chest and can injure your joints; keep a consistent, slight bend in your elbows to protect the joint and maintain tension on the chest. Using momentum to lift the weights reduces muscle engagement and effectiveness; control both the lowering and lifting phases, focusing on a slow, deliberate contraction of the chest muscles. Arching the lower back excessively can lead to spinal strain; engage your core and gently press your lower back into the bench to maintain spinal stability and prevent injury.