Alternate Lying Dumbbell Reverse Fly Overview
The alternate lying dumbbell reverse fly builds your upper back. It hits your rear shoulders too. These are the small muscles on the back of your shoulders. It also works the muscles between your shoulder blades. You lie face down on a flat bench. You hold a dumbbell in each hand and lift them out to the side. This move is great for posture. It pulls your shoulders back where they belong. Many people are weak here from slouching. The alternate lying dumbbell reverse fly fixes that. You work one arm at a time to focus hard. Lying face down keeps you from cheating with your body. Use it on a back day or a shoulder day. It fits best after your big pulls.
What Is The Point of the Alternate Lying Dumbbell Reverse Fly?
The alternate lying dumbbell reverse fly builds your middle back and rear delts while improving posture. It fights forward head posture from sitting all day.
How To Do The Alternate Lying Dumbbell Reverse Fly
- Set a flat bench and lie face down on it with your chest and belly supported. Let your head hang just off the end so your neck stays neutral.
- Hold a dumbbell in each hand and let both arms hang straight down toward the floor, palms facing each other. The bench blocks any swinging or cheating.
- Set your shoulder blades down and back before you lift. Think about starting the movement from your mid-back, not your hands.
- Fix a soft, slight bend in your elbows and hold it. This is a fly, so the elbow angle stays constant the whole set.
- Take a breath, brace, and lift one dumbbell out to the side in a wide arc. Lead with your elbow and keep your palm facing down toward the floor.
- Raise until your upper arm is level with your torso, roughly parallel to the floor. Going higher just recruits the traps.
- Squeeze your shoulder blade toward your spine at the top and hold for a beat. This is where the rear delt and mid-back do their work.
- Lower slowly back to the hang over 2 to 3 seconds under full control, then repeat with the other arm. Alternate sides each rep.
- Keep your core tight and chest down throughout. Aim for 12 to 15 controlled reps per arm.
- Rest about a minute between sets and keep the same strict tempo on every one. Reset your shoulder blades down and back before each rep so the rear delt keeps leading the pull.
Alternate Lying Dumbbell Reverse Fly Form Tips
- Keep your chest and belly flat on the bench.
- Lift with a wide arc, not a bent-arm pull.
- Keep the same soft elbow bend the whole time.
- Squeeze your shoulder blade at the top of each rep.
- Stop when your arm reaches shoulder height.
- Breathe out as you lift. Breathe in as you lower.
- Move slow both ways. No swinging.
- Keep your neck long and eyes down.
- Let your arm hang fully at the bottom.
Common Mistakes to Avoid for the Alternate Lying Dumbbell Reverse Fly
- Using momentum to swing the weights up. Even lying down you can jerk with your shoulders and hips, which robs the rear delts and strains the joint. Keep your body still on the bench and lift only with the target muscle.
- Straightening the elbows into a row or pulldown. If your elbow angle opens and closes, you turn a fly into a row that hits the lats and biceps. Set a soft bend and hold it exactly from bottom to top.
- Lifting past parallel to the floor. Swinging the arms up too high hands the movement to your traps and can pinch the shoulder. Stop when your upper arms are level with your torso.
- Shrugging the traps toward your ears. When your shoulders ride up, the upper traps take over and the rear delts switch off. Set the blades down first and keep your neck long.
- Going too heavy. Heavy dumbbells on a long-lever fly force you to bend your elbows and cheat, which defeats the purpose. Choose a light weight you can control through a clean arc.
- Dropping the weight on the way down. Skipping the eccentric wastes a big part of the growth signal on this small muscle. Lower over 2 to 3 seconds and keep tension on the rear delt.
- Letting the arm swing forward instead of straight out. If your hand travels toward your head, the load shifts off the rear delt. Keep the arc wide and drive the elbow out to the sides.
- Craning your neck up to look forward. Lifting your head off neutral compresses your neck and breaks position. Let your face point down and keep your neck long.
- Forgetting the squeeze at the top. Touching the top and immediately dropping skips the best part of the rep. Pinch the shoulder blade in and hold a beat every time.
- Holding your breath the entire set. Bracing without breathing spikes your blood pressure and burns you out early. Exhale as you lift and breathe between reps.
- Double-lifting both arms together. Alternating exists so you can focus tension on one side at a time, so lifting both rushes the movement. Keep a clean one-up, one-down rhythm.
Alternate Lying Dumbbell Reverse Fly Workout Tips
- Lying face down removes almost all cheating, which makes this one of the strictest rear delt builders. Use that honesty to really isolate the muscle.
- Chase the feeling, not the weight. The rear delt is tiny and easily overpowered, so slow down and hunt for its squeeze on every rep.
- Turn your pinky slightly up as you lift. That small external rotation puts the rear delt in its strongest position and improves the contraction.
- Keep reps high, around 12 to 20 per arm. Rear delts thrive on controlled volume rather than heavy loads.
- Add a one second hold at the top for a few sets. That pause strips out momentum and forces the muscle to work at the hardest point.
- Alternating gives you a moment to reset each side and focus fully. Use it to bring up a weaker rear delt by matching reps side to side.
- Program this near the end of a back or shoulder day. It is a detail and posture builder, not a heavy main lift.
- Pair it with face pulls and rows to build a thick, healthy upper back. Strong rear delts balance out all your pressing.
- Keep your wrists relaxed and neutral. A hard grip just fatigues your forearms and pulls attention off the rear delts.
- Progress by adding reps before weight. Build to the top of your range with clean form, then bump the dumbbells up a notch.
- Do not ego load. On a movement this small, control beats weight every single time, and swinging just wastes the set.
- Film a set from the side to catch swinging or trap takeover. Video shows form issues far better than feel.
- Breathe out as you lift and in as you lower for a steady rhythm. Smooth breathing keeps you from gassing out.
- If a flat bench bothers your neck, let your head hang free off the end. Keeping the neck neutral makes the set far more comfortable.
- Strong rear delts protect your shoulders during pressing and pull-ups. Treat this as insurance for your bigger lifts.
- Be patient. Rear delts are stubborn, so it is consistent strict volume over months that finally makes them pop.
Questions & Comments
Be the first to ask a question about this exercise.