Exercise Ball Supine Triceps Extension
- Target muscle
- —
- Equipment
- Dumbbell
- Body part
- Upper Arms
- Type
- Strength
The exercise ball supine triceps extension is an upper-arm strength move that targets the triceps, performed lying back on a stability ball while holding dumbbells. Using the ball in place of a flat bench forces your core and glutes to work for stability, making it a practical way to build pressing lockout strength and arm size at home.
How to do the Exercise Ball Supine Triceps Extension
- 1Sit on the stability ball holding a dumbbell in each hand, then walk your feet forward and roll down until your upper back and head rest on the ball.
- 2Set your feet flat on the floor about hip-width apart and lift your hips so your torso forms a stable bridge from shoulders to knees.
- 3Press the dumbbells up over your chest with palms facing each other and arms fully extended.
- 4Keeping your upper arms vertical and still, bend only at the elbows to lower the dumbbells toward the sides of your head.
- 5Lower under control until you feel a stretch in your triceps, with your forearms close to parallel with the floor.
- 6Extend your elbows to press the dumbbells back up to the starting position, squeezing your triceps at the top.
- 7Finish all your reps, then bend your knees, roll back to a seated position, and lower the dumbbells safely.
Form tips
- Keep your upper arms pointing straight up and fixed in place — only the forearms should move through the rep.
- Brace your core and squeeze your glutes throughout the set so the ball stays steady under your back.
- Start lighter than you would on a flat bench; the unstable surface makes the load harder to control.
- Lower the dumbbells slowly and pause briefly in the stretched position before pressing back up.
Common mistakes
- Letting the elbows drift forward or flare wide, which turns the move into a press and takes tension off the triceps.
- Dropping the hips so your body sags off the ball, which kills stability and strains the lower back.
- Using too much weight and bouncing out of the bottom, risking the elbow joint and losing control of the dumbbells near your head.
- Going too shallow on the lowering phase, which cuts the range of motion and the triceps stretch that drives growth.
Frequently asked questions
What muscles does the exercise ball supine triceps extension work?
It mainly works the triceps, the muscles on the back of the upper arm that straighten the elbow. Lying on the ball also engages your core and glutes to keep your torso stable.
Why use an exercise ball instead of a flat bench?
The ball replaces the bench but adds an unstable surface, so your core and glutes have to brace to keep you steady. It is a useful option at home when you do not have a bench.
How many sets and reps should I do?
For arm size and endurance, 3 to 4 sets of 10 to 15 reps with a controlled tempo works well. Because the surface is unstable, favor moderate weight and clean form over heavy loads.
Should I use one dumbbell or two?
Two dumbbells, one in each hand with palms facing each other, is the standard setup and balances the load evenly. You can also use a single dumbbell held with both hands if you prefer.
