"Jessica is a natural athlete and loves working hard," says Walsh. "Anytime we can punch, kick or throw something, she's totally in her element!"
Jog for 5-10 minutes to warm up.
Standing up straight, hold a 6-10 pound medicine ball above your head.
Without bending over, slam the ball into the ground with enough force for it to bounce back up (to do this, your arms will follow the motion of the ball until you release it). Reconnect with it at its peak height.
Repeat 20-25 times, rest for one minute and repeat.
Warm down with a short jog and light stretching.