I'm currently doing a few weeks of fat loss and am running 30 minutes (about 3.5 miles) during the morning, 3 times a week.
My buddy just told me that I should be doing intense sprints, followed by light jogging, then more sprints, jogging etc. for only 20 minutes....
which sounds better for losing fat and maintaining as much muscle as possible????
(assume I have the right caloric intake, etc.)