Full-Body Fitness Quickie: 20-Minute Cardio HIIT Workout

• Stand with your feet together and your knees soft.
• Jump and come into a lunge with your left leg forward.
• Push off with both feet, jumping them together, then hopping into a lunge with your right leg in front.
• Continue alternating sides for 40 seconds, then rest for 20.

Do two rounds of this circuit, and rest for one minute before starting the second circuit.