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This 40-minute treadmill workout cut my 5km running time by 8 minutes - here's how to do it

This workout consists of four-minute bursts of exercise, done at 85 to 95% of your maximum heart rate. Afterwards, you get ...
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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 ...