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40-Minute Treadmill Workout With Intervals

A Kick-Your-Own-Ass Treadmill Workout — No Trainer Needed

Increase your endurance, raise your heart rate, and rev your metabolism with this interval workout. This ladder run — with the speed intervals increasing in duration as the workout progresses — is designed to push you out of your comfort zone to burn some serious calories. If this is not your pace, no worries! Find a speed that works for you, but keep the timing and increases in pace the same.

Click here for a printable version you can take to the gym. Now get running!

Image Source: Shutterstock
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