Forget running — this 20-minute low-impact workout boosts your metabolism and builds cardio fitness

Use this 20-minute low-impact, standing workout to fire up your metabolism and get fit at home without any equipment.
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This 20-Minute Cardio Workout Spikes Your Metabolism for 36 Hours Without Stepping Foot in a Gym

This 20-Minute Cardio Workout Spikes Your Metabolism for 36 Hours Without Stepping Foot in a Gym originally appeared on Men's Fitness. Can't get to the gym but need to get some cardio in? Changes are ...