Suspension Fly exercise animation (Female)

Suspension Fly

Target muscle
Pectoralis Major Sternal Head
Synergist muscles
Biceps Brachii, Deltoid Anterior, Pectoralis Major Clavicular Head
Equipment
Suspension
Body part
Chest
Type
Strength

The Suspension Fly is a bodyweight chest exercise performed with TRX-style suspension straps anchored overhead, primarily targeting the pectoralis major sternal head (mid and lower chest fibers). The anterior deltoid, biceps brachii, and pectoralis major clavicular head assist throughout the movement. It is a demanding open-chain fly that builds chest strength and shoulder stability without external weights.

How to do the Suspension Fly

  1. 1Anchor the suspension straps overhead and adjust the handles to roughly hip height — the lower the handles, the more challenging the exercise.
  2. 2Stand facing away from the anchor point, grip a handle in each hand with palms facing inward, and walk your feet forward until the straps are taut and angled behind you.
  3. 3Lean your body forward at roughly 20–45 degrees from vertical, shifting your weight into the straps; the degree of lean determines the resistance.
  4. 4Extend your arms forward and slightly below shoulder height with a soft, fixed bend at the elbows — this is your starting position.
  5. 5Brace your core, squeeze your glutes, and maintain a rigid straight line from head to heels throughout the movement.
  6. 6Inhale and slowly open your arms outward and downward in a wide arc, keeping the elbow bend constant, until you feel a full stretch across your chest.
  7. 7Exhale and draw your arms back together in a controlled hugging motion, squeezing your pectoralis major as your hands meet in front of you.
  8. 8Pause briefly at peak contraction, then return to the open position under control for the next repetition.
  9. 9After completing all reps, step back toward the anchor point to release tension before setting down the handles.

Form tips

  • Maintain a fixed soft bend in your elbows throughout both phases — straightening the arms turns the fly into a press and shifts tension away from the pectoralis major.
  • Control the eccentric (opening) phase for 2–3 seconds; rushing through the stretch shortens time under tension on the pectoralis major sternal head.
  • To increase difficulty, step your feet further forward to increase your lean; to decrease difficulty, step back toward the anchor.
  • Keep your hips, core, and glutes actively engaged so your body stays in a rigid plank — any sag through the hips reduces chest load and stresses the lower back.
  • Set handles at a height that allows a full arc of motion with control; handles set too low before you have adequate strength significantly increases the risk of losing control.

Common mistakes

  • Locking out the elbows: straightening the arms fully removes tension from the pectoralis major and places excessive stress on the elbow joints, risking hyperextension.
  • Hinging at the hips: breaking at the waist reduces the mechanical load transferred through the chest and converts the movement into a partial bent-over fly, diminishing effectiveness.
  • Opening the arms too wide or letting them drop below hip level: this compromises the shoulder joint position, risks impingement, and shifts stress away from the pectoralis major sternal head.
  • Rushing the return: swinging the arms back together with momentum bypasses the pectoralis major's eccentric work and reduces the total stimulus to the chest.
  • Too much lean before building adequate strength: an extreme forward angle without the chest and shoulder strength to control it greatly increases the risk of a sudden fall or shoulder strain.

Frequently asked questions

What muscles does the Suspension Fly work?

The Suspension Fly primarily targets the pectoralis major sternal head, which covers the mid and lower chest. The anterior deltoid, biceps brachii, and pectoralis major clavicular head act as synergists to assist and stabilize the movement throughout the arc.

Is the Suspension Fly good for beginners?

It can be suitable for beginners if started at a low difficulty angle — minimal forward lean keeps the load manageable. Because the handles are unstable, some baseline upper-body strength and body-control awareness is helpful before progressing to steeper angles.

How do I make the Suspension Fly harder or easier?

Adjust your body angle relative to the anchor point. Stepping your feet further forward increases your lean and adds more resistance. Stepping back toward the anchor reduces the angle and makes the exercise easier.

How many sets and reps should I do for the Suspension Fly?

For hypertrophy, 3–4 sets of 10–15 repetitions work well. Since there is no external load to add, progression is achieved by increasing your forward lean angle, slowing the eccentric phase to 3 seconds, or reducing rest between sets.

What is the difference between a Suspension Fly and a cable fly?

Both are open-chain fly movements that stretch and contract the pectoralis major. The suspension version uses your bodyweight and body angle as the resistance and demands greater core and stabilizer activation, while a cable fly uses a precise external load that can be incremented in small steps — making cables generally easier to progress systematically.

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