What muscles does the Dumbbell Lying Single Extension work?

The Dumbbell Lying Single Extension primarily targets the triceps, focusing on the long head for improved strength and definition. It does not significantly engage secondary muscles, making it highly effective for isolating the triceps.

Is the Dumbbell Lying Single Extension suitable for beginners?

Yes, beginners can safely perform this exercise if they use a light dumbbell and maintain slow, controlled movements. Starting with lower weight helps master form and prevents strain on the elbow joint.

What equipment do I need for a Dumbbell Lying Single Extension?

You will need a dumbbell and a flat bench for proper support during the exercise. If a bench isn’t available, you can perform it lying on the floor, but the range of motion will be slightly limited.

How many sets and reps should I do for the Dumbbell Lying Single Extension?

For strength and muscle building, aim for 3–4 sets of 8–12 reps using a challenging but manageable weight. Beginners can start with 2–3 sets of 10–15 reps to develop technique before increasing load.

What are common mistakes to avoid when doing the Dumbbell Lying Single Extension?

A common mistake is letting the upper arm move during the lift, which reduces triceps activation. Also, avoid locking out the elbow forcefully or dropping the dumbbell too quickly both can cause injury.

Are there variations of the Dumbbell Lying Single Extension?

Yes, you can perform the movement with both arms simultaneously, use an EZ bar for added stability, or switch to a seated position for a different triceps engagement angle. These variations can help prevent plateaus.

What are the benefits of the Dumbbell Lying Single Extension?

This exercise isolates and strengthens the triceps, improving upper arm tone and pushing power. It also enhances elbow stability, which supports better performance in pressing exercises like bench presses and overhead lifts.

Dumbbell Lying Single Extension

Target Muscles

Primary:

Triceps

Equipment Required

Bench

Dumbbell

Exercise Type

Weight & Reps

How To Do

Lie flat on a bench holding a dumbbell in one hand with your arm extended straight up. Keeping your upper arm still and perpendicular to the bench, slowly bend your elbow to lower the dumbbell toward your forehead, then extend your arm back to the starting position. Maintain a neutral wrist and control the movement to target your triceps effectively.

Step-by-Step Instructions

Lie flat on a bench with your feet firmly planted on the ground for stability.
Hold a dumbbell in one hand and extend your arm straight up towards the ceiling, keeping your wrist neutral.
Place your non-working hand on your torso or bench for support.
Slowly bend your elbow to lower the dumbbell towards your forehead or just behind your head, keeping your upper arm stationary and perpendicular to the bench.
Pause briefly at the bottom of the movement, ensuring control and avoiding momentum.
Engage your triceps to extend your arm back to the starting position, fully straightening your elbow.
Repeat for the desired number of repetitions, then switch arms and repeat the movement on the other side.

Explore more triceps exercises or bench exercises in our exercise library.

Alternative Exercises

Dumbbell Lying Triceps Extension

Triceps

Bench • Dumbbell

Dumbbell Lying Extension (Across Face)

Triceps

Bench • Dumbbell

Barbell Lying Triceps Extension (Skull Crusher)

Triceps

Bench • Barbell

EZ-Bar Lying Close-Grip Triceps Extension Behind Head

Triceps

Bench • EZ Bar

Frequently Asked Questions

What muscles does the Dumbbell Lying Single Extension work?: The Dumbbell Lying Single Extension primarily targets the triceps, focusing on the long head for improved strength and definition. It does not significantly engage secondary muscles, making it highly effective for isolating the triceps.
Is the Dumbbell Lying Single Extension suitable for beginners?: Yes, beginners can safely perform this exercise if they use a light dumbbell and maintain slow, controlled movements. Starting with lower weight helps master form and prevents strain on the elbow joint.
What equipment do I need for a Dumbbell Lying Single Extension?: You will need a dumbbell and a flat bench for proper support during the exercise. If a bench isn’t available, you can perform it lying on the floor, but the range of motion will be slightly limited.
How many sets and reps should I do for the Dumbbell Lying Single Extension?: For strength and muscle building, aim for 3–4 sets of 8–12 reps using a challenging but manageable weight. Beginners can start with 2–3 sets of 10–15 reps to develop technique before increasing load.
What are common mistakes to avoid when doing the Dumbbell Lying Single Extension?: A common mistake is letting the upper arm move during the lift, which reduces triceps activation. Also, avoid locking out the elbow forcefully or dropping the dumbbell too quickly both can cause injury.
Are there variations of the Dumbbell Lying Single Extension?: Yes, you can perform the movement with both arms simultaneously, use an EZ bar for added stability, or switch to a seated position for a different triceps engagement angle. These variations can help prevent plateaus.
What are the benefits of the Dumbbell Lying Single Extension?: This exercise isolates and strengthens the triceps, improving upper arm tone and pushing power. It also enhances elbow stability, which supports better performance in pressing exercises like bench presses and overhead lifts.