Holding a dumbbell with both hands, sit on a stability ball.
Roll down the ball until it is under your back and raise your hips until they are level with your torso.
Planting the soles of your feet firmly on the ground, straighten your elbows and raise your arms so that the dumbbell is over your chest.
Keeping your hips facing upward and your arms straight, inhale as you allow the weight of the dumbbell to rotate your torso to one side.
Exhale as you slowly rotate your torso back to the starting position, moving the dumbbell through an arc-like motion.
Repeat steps one and two on the opposite side.
Continue alternating between sides until you have performed the desired number of repetitions.
Comments and tips
Compared to the cable Russian twist on stability ball, this exercise may be slightly easier to perform. Using a cable provides tension all throughout the twist, whereas in the dumbbell Russian twist on stability ball, resistance disappears when the dumbbell is vertical.
Since daily activities often involve rotation of the spine, the dumbbell Russian twist on stability ball is important for functional fitness.
Keep your hips still and facing upward throughout the exercise.
Do not tuck your chin into your chest. Make sure your neck is neutral throughout the exercise.