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The scientific, efficient way to get in shape quickly
Four by four is the scientifically proven[1], efficient way to get in shape quickly. It works both for athletes and couch potatoes.
You alternate between running quickly for four minutes and slowly for three minutes. You do four repetitions, for a total of 28 minutes.
[1] Aerobic high-intensity intervals improve VO2max more than moderate training, Helgerud et. al., 2007
What's New in the Latest Version 1.0.0
Last updated on Jun 21, 2017
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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Four By Four Running
1.0.0 by Anders Schau Knatten
Jun 21, 2017