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Re:Ask HN: Is anyone successful with the 7-minute workout so... by pyoung on Sunday February 16, 2014 @03:35PM (#7249158)
The point of the 7-min workout isn't to keep you in as good of shape as a 5+ hour workouter, the point is to get 90% of the health benefits in a minimal amount of time as the 5+ hour person. The 7-min workout is designed for the busy professional concerned about their health. If you want to run triathlons, you still are going to need to slog it out doing training workouts.
Re:Ask HN: Is anyone successful with the 7-minute workout so... by patrickmay on Sunday February 16, 2014 @05:14PM (#7249592)
I would be astonished if 7 minutes per day provided even a measurable percentage of the benefits of exercising 5 hours per week (say 3.5 hours lifting and 3 30 minute runs).

Is there any evidence that it can?

Re:Ask HN: Is anyone successful with the 7-minute workout so... by pyoung on Sunday February 16, 2014 @10:58PM (#7250573)
The nytimes article listed in the parent, which is what sparked the 7-min workout craze, discusses and links to the study. I am not going to get into too much detail, but the general idea is that working a bunch of different muscle groups at high intensity for short periods gets you most of the benefits of longer endurance based workouts.