“15-Minute Cardio Burst 4.0 Workout”

No equipment needed. Tip: Complete Series 1.0, 2.0 and 3.0 for 4 weeks each prior to Series 4.0. Burn mega calories, work muscles to exhaustion and lose fat with this quick, challenging workout. Find the Weekly Workout Schedule for this Series, and more, on my website (FitnessMaggie).