This 7-minute workout is ideal if you have little time to exercise or don't have access to a gym.

According a study published in the American College of Science and Medicine's Health & Fitness Journal, the combination of aerobic and resistance training performed at a high-intensity can be extremely effective.

The study recommends performing each of the following exercises for 30 seconds for a total time of 7 minutes. Now if you do have time to spare, repeating the circuit three times will be even more effective.

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