Chest Exercise · Dumbbell
Biomechanical cues verified by the PlanWorkouts Science Review Board under CSCS editorial oversight; see our editorial standards.
The Dumbbell Lying Hammer Press is a compound chest movement designed to train the Pectorals with direct engagement of the Shoulders.
Transverse plane horizontal adduction of the shoulder combined with elbow extension. Peak mechanical stretch occurs when pectorals are fully lengthened at chest level. Scapular retraction is vital for shoulder joint safety. Executing this with strict form maximizes muscle fiber recruitment while protecting joint structures.
Quick Exercise Facts
Target Muscle Activation
Pressing with a neutral grip while lying flat brings the triceps in more directly than a standard pronated bench press grip, while still working the chest through the same flat-bench plane. It's a joint-friendlier option for lifters whose wrists or shoulders don't love a wide barbell grip. The independent dumbbells also mean each side has to stabilize on its own, unlike a fixed bar.
How to Do the Dumbbell Lying Hammer Press
- Lie back on a bench holding a dumbbell in each hand, palms facing one another, arms pressed straight up.
- Lower the dumbbells to either side of your chest, bending your elbows to roughly 90 degrees.
- Press the dumbbells back to the start, fully straightening your arms.
- Continue for the prescribed repetitions while maintaining full control through both the lift and lower phases.
Recommended Sets & Reps by Training Goal
70–80% 1RM · 90–120s rest
85%+ 1RM · 2–3 min rest (Calc 1RM)
50–60% 1RM · 45–60s rest
Biomechanical & Joint Load Cues
Transverse plane horizontal adduction of the shoulder combined with elbow extension. Peak mechanical stretch occurs when pectorals are fully lengthened at chest level. Scapular retraction is vital for shoulder joint safety.
Common Mechanical Mistakes & Form Errors to Avoid
- Excessive Elbow Flare (90°): Flaring the upper arms directly perpendicular to the torso pinches the supraspinatus tendon against the acromion. Tuck elbows to roughly 45–70 degrees.
- Loss of Scapular Retraction: Allowing shoulder blades to slide forward off the bench shifts mechanical tension off the pectorals onto the delicate anterior deltoids.
- Bouncing Off the Sternum: Using ribcage recoil to bounce the load bypasses the critical bottom turnaround stretch where muscle protein signaling is highest.
Proper Breathing Patterns & Core Engagement
Inhale deeply during the lowering (eccentric) phase while pinning shoulders back. Exhale forcefully through the concentric pressing phase past the friction zone.
Add the Dumbbell Lying Hammer Press to Your Custom Workout Routine
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Injury Modification & Joint Safety
Lifters with anterior shoulder impingement or AC joint inflammation should restrict elbow flare to 45–60 degrees or substitute with neutral-grip dumbbell presses. If joint irritation persists, immediately stop and substitute this movement with another exercise from the Chest exercises category.
Muscles Worked
The Dumbbell Lying Hammer Press primarily targets the Pectorals, with Triceps as the primary synergist muscle group, along with the Shoulders.
More Chest Exercises
Archer Push Up
Assisted Chest Dip (kneeling)
Assisted Seated Pectoralis Major Stretch With Stability Ball
Assisted Wide-Grip Chest Dip (kneeling)
Band Bench Press
Band One Arm Twisting Chest Press
More Pectorals Exercises
Barbell Bench Press
Barbell Decline Bench Press
Barbell Decline Pullover
Barbell Decline Wide-Grip Press
Barbell Front Raise And Pullover
Barbell Guillotine Bench Press
Equipment Alternatives
Don't have dumbbell? These target the same pectorals with different equipment.
FAQ
- What muscles does the Dumbbell Lying Hammer Press work?
- The Dumbbell Lying Hammer Press primarily targets the pectorals as the primary agonist. Synergist assistance is provided by the triceps along with the shoulders. Maintaining strict biomechanical alignment ensures maximal tension remains focused on the intended muscle fibers rather than shifting to surrounding stabilizer joints.
- What equipment do I need for the Dumbbell Lying Hammer Press?
- The Dumbbell Lying Hammer Press is performed using a dumbbell. Ensure all equipment is securely positioned with collars or safety pins locked before loading working sets. If you train in a home gym or minimal setup, explore our equipment-free and resistance band alternatives below.
- What is the most common form mistake on the Dumbbell Lying Hammer Press?
- The most frequent error is excessive elbow flare (90°): Flaring the upper arms directly perpendicular to the torso pinches the supraspinatus tendon against the acromion. Tuck elbows to roughly 45–70 degrees.. Controlling the 2 to 3-second eccentric lowering phase ensures maximal hypertrophic stimulus while shielding connective tissue.
- How many sets and reps should I perform on the Dumbbell Lying Hammer Press?
- For muscle hypertrophy and size, aim for 3 to 4 working sets of 8 to 12 repetitions at 70% to 80% of your 1RM with 90 to 120 seconds rest. For absolute strength development, prioritize 4 to 5 sets of 3 to 6 heavier reps with 2 to 3 minutes rest.
- What's a good alternative to the Dumbbell Lying Hammer Press?
- If you don't have access to a dumbbell, the Chest And Front Of Shoulder Stretch targets the same pectorals using body weight instead. This alternative replicates the same joint angle and movement plane while allowing you to train effectively with different available gear. You can also substitute it seamlessly in our free Workout Plan Builder.