Instructions

1

Lie supine on a flat bench or floor with knees bent and feet flat. Position body in a stable, horizontal alignment with dumbbells held at arm's length above the chest with palms facing forward.

2

Grip dumbbells with neutral palms facing forward. Maintain a slight bend in the elbows and ensure shoulders are stabilized with scapulae retracted against the bench.

3

Lower the dumbbells in a controlled arc, allowing elbows to bend and move outward while maintaining upper arm position. Continue descent until dumbbells reach approximately ear/shoulder level or slight stretch is felt in biceps.

4

Drive dumbbells upward by flexing biceps and pressing through palms, returning to starting position with arms extended. Maintain control throughout and avoid swinging or using momentum.

PRIMARY MUSCLESBiceps Brachii

SECONDARY MUSCLESBrachialis, Brachioradialis, Anterior Deltoid

EQUIPMENTDumbbell

DIFFICULTYIntermediate

Overview

When programming for Biceps Brachii growth, the Dumbbell Lying Floor Skullcrusher stands out as a highly efficient Strength choice. Performing this movement with Dumbbell forces your stabilizer muscles to work in tandem with the primary movers, translating to functional strength and enhanced muscular endurance.

Benefits

Allows for a natural movement path that closely mimics functional daily activities.
Significantly enhances the structural integrity and power of the Biceps Brachii.
Utilizes Dumbbell to create sustained mechanical tension, forcing deep muscle adaptation.

Common Mistakes

Using excessive momentum to swing the Dumbbell rather than controlling the eccentric phase.
Failing to achieve a full range of motion, which drastically limits Biceps Brachii engagement.
Shrugging the shoulders or compensating with secondary muscles rather than isolating the Biceps Brachii.
Losing core tension, leading to poor spinal alignment and reduced power output.

Pro Tips

If you feel this primarily in your joints rather than the Biceps Brachii, instantly lower the weight and readjust your Dumbbell setup.

Muscle Anatomy

The primary driver is the Biceps Brachii. However, the movement also recruits Brachialis, Brachioradialis, Anterior Deltoid to maintain control of the Dumbbell.

Exercise Variations

Dumbbell Dumbbell Lying Floor Skullcrusher
Cable Dumbbell Lying Floor Skullcrusher
Banded Dumbbell Lying Floor Skullcrusher

Beginner Tips

If you are new to the Dumbbell Lying Floor Skullcrusher, focus on mastering the movement pattern with zero weight before adding Dumbbell.

Dumbbell Lying Floor Skullcrusher