Don't you hate monotonous workouts that go nowhere and do nothing except bore you with the same running track every day or the same treadmill workout routine? The body hates them too and it doesn't benefit as much from repetitious routines as from a varied routine and a varied course. Which is where interval training comes in. Interval training allows you to run fast for four minutes then slow for two minutes, then fast for three minutes and slow for two minutes, and fast for one minute and slow for one. This kind of interplay and variety will boost your workout results.
Two weeks of high-intensity aerobic interval training increases the capacity for fat oxidation during exercise in women. J Appl Physiol 102: 1439-1447, 2007. First published December 14, 2006. Jason L. Talanian,1 Stuart D. R. Galloway,2 George J. F. Heigenhauser,3 Arend Bonen,1 and Lawrence L. Spriet1
1Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada, 2Department of Sport Studies, University of Stirling, Stirling, Scotland; and 3Department of Medicine, McMaster University, Hamilton, Ontario, Canada