The medicine ball jumping jill is an explosive medicine ball exercise that is similar to a jumping jack but performed holding a medicine ball between the hands. It can be performed for time or reps in a dynamic warm-up or fat-loss or conditioning circuit, usually paired with other bodyweight or medicine ball movements.
Quickly warms up the muscles and raises the body's core temperature
Stretches and mobilizes the hips and shoulders
Powerful isometric contraction for the upper back and core