One Arm Stability Ball Triceps Extension

Instructions

1. 1

   Sit on an exercise ball with your feet flat on the ground and your back straight.

2. 2

   Hold a dumbbell in one hand with your palm facing up and your elbow bent at a 90-degree angle.

3. 3

   Extend your arm straight up towards the ceiling, keeping your elbow stationary.

4. 4

   Slowly lower the dumbbell back down to the starting position.

5. 5

   Repeat for the desired number of repetitions, then switch arms.