30 Workouts You Can Do in 20 Minutes or Less

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We all know we need to exercise. But we don't all have the time. A typical exercise plan — cardio, strength training and flexibility — can take an hour or longer each day. For people with busy lives, that's often not possible.

Luckily, research has shown that short bursts of exercise can be just as effective as longer workouts. The key is making the most of your time. Here are 30 workouts you can do in minutes a day to boost fitness and increase strength.