whether you only have a short window to spare for a workout,try this challenging 20-minute treadmill routine. Beyond switching up the speed every two minutes, you'll also be changing the incline, and which challenges the body to work even harder. Even after this short cardio session,you'll feel light, energized, or alert to power through the rest of your day.
Before you head for your hasten,be sure to print this workout to bring to the gym with you!
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20-Minute Abs and Arms Blast - With a Playlist!
Source: popsugar.com