HIIT and Sprint Interval: 20-minute intense workouts for get in shape and endurance

Run for about half a minute as if you were being chased by a lion. Rest for about half a minute. Repeat a few times. This is how you get the fancy sprint interval and HIIT workouts. It’s time-efficient, great for shaping and burning fat, building endurance, preserving muscle and even keeps your brain functioning… Continue reading HIIT and Sprint Interval: 20-minute intense workouts for get in shape and endurance