Single-Arm Z-Press

Which muscles does it train?

Equipment needed

How to perform it

For strength, 3 to 5 sets of 3 to 6 reps with 2 to 3 minutes of rest are common. For hypertrophy, use 3 to 4 sets of 8 to 12 reps with 60 to 120 seconds of rest.

Execution and technique cues

• Sit flat on the floor with legs extended straight in front of you, holding a dumbbell at shoulder height.
• Sit tall with a perfectly vertical spine, brace the core, and keep the non-working arm out for balance.
• Press the dumbbell straight overhead, keeping the elbow tucked slightly forward at a 45-degree angle.
• Lock out the elbow at the top with the arm next to the ear, then lower the dumbbell under control.

Common mistakes

• Rounding the lower or upper back instead of maintaining an upright, neutral spine.
• Bending the knees or leaning backward to make the press easier, which bypasses core demands.
• Letting the dumbbell drift outward away from the body during the press, risking shoulder strain.

Frequently asked questions

What if I lack the flexibility to sit upright with straight legs?

You can widen your stance slightly or sit on a small weight plate or yoga block to make maintaining a flat back easier.

Why is this press more difficult than a standing overhead press?

Sitting on the floor removes any leg drive and forces your core, hip flexors, and upper back to work intensely to stabilize the spine.

Related exercises