Exercise guide
Dumbbell Single Arm Z Press
- Intermediate
- Compound
- Rep-based
- Upper arms
The Single Arm Z Press is an advanced overhead press performed seated on the floor, eliminating leg drive to maximize shoulder recruitment and core stability. It forces a perfectly upright posture, making it a premier exercise for building vertical pressing strength and oblique control.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit on the floor with your legs extended straight in front of you in a wide 'V' shape.
- Hold a dumbbell in one hand at shoulder height in a neutral or slightly tucked front-rack position.
- Sit tall on your sit-bones with a neutral spine and your non-working arm extended to the side for balance.
- Flex your quads and pull your toes toward your shins to create a stable lower-body anchor.
How to do it
- Inhale deeply and brace your core, ensuring your torso is perfectly vertical with no backward lean.
- Exhale as you press the dumbbell directly overhead until your elbow is fully locked out and your arm is in line with your ear.
- Inhale as you lower the dumbbell under control back to the starting rack position at the shoulder.
- Maintain a controlled 2-0-2 tempo, focusing on keeping the torso stationary throughout the movement.
Form checklist
- Keep your heels glued to the floor at all times.
- Avoid leaning back or arching the lower back as the weight goes up.
- Keep the working elbow slightly in front of the shoulder, not flared out to the side.
- Ensure the head stays neutral; do not crane the neck forward.
Pro tips
- Think about 'growing taller' as you press the weight up to engage the deep stabilizers of the spine.
- Squeeze the handle of the dumbbell tightly to increase shoulder stability through irradiation.
Make it harder
- Bring your legs together in front of you to significantly reduce your base of support and increase the core challenge.
- Perform the movement with a kettlebell in the 'bottoms-up' position to challenge grip and rotator cuff stability.
Frequently asked
- What muscles does the dumbbell single arm z press work?
- The dumbbell single arm z press primarily targets the deltoids, and also works the serratus anterior as secondary muscles.
- What equipment do you need for the dumbbell single arm z press?
- The dumbbell single arm z press uses dumbbell.
- Is the dumbbell single arm z press good for beginners?
- The dumbbell single arm z press is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.