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Scientific method of workout: 12 intensive exercises in 7 minutes.
Scientific method of workout: 12 intensive exercises in 7 minutes, 30 seconds each exercise, 10 second of resting in between. You only need a small chair, a wall and yourself.
Inspired by this article of the New York Times: http://well.blogs.nytimes.com/2013/05/09/the-scientific-7-minute-workout