Alternating Medicine Ball Press on Swiss Ball

Lie on a Swiss ball so that the ball is supporting your upper back, neck and head. Your legs will be bent, feet directly under your knees and your butt will be off the ball. Your chest and thghs will form a flat table. Squeeze your glutes and core to create a bridge with your torso from shoulders to knees. Hold the med ball in two hands above your chest. Now, bring the ball to the left side of your chest with both hands, explosively press upward, then bring the ball to the right side of your chest. Continue alternating this way for 20 repetitions.