The Scientific 7-Minute Workout by Gretchen Reynolds, nytimes: The exercises should be performed in rapid succession, allowing 30 seconds for each, while, throughout, the intensity hovers at about an 8 on a discomfort scale of 1 to 10. Those seven minutes should be, in a word, unpleasant. The upside is, after seven minutes, you’re done. #Fitness

The Scientific 7-Minute Workout

The Scientific 7-Minute Workout by Gretchen Reynolds, nytimes: The exercises should be performed in rapid succession, allowing 30 seconds for each, while, throughout, the intensity hovers at about an 8 on a discomfort scale of 1 to 10. Those seven minutes should be, in a word, unpleasant. The upside is, after seven minutes, you’re done. #Fitness

15 Full-Body Workouts Under 15 Minutes

15 Full-Body Plans Under 15 Minutes

20-Minute Home Cardio Workout

20-Minute Home Cardio Workout

By now, we all hopefully know that interval training rocks. Whether you're running, rowing, or swimming, playing with speed has multiple benefits. One way to push the interval envelope is to decrease the rest time between your bouts of sprinting.

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