HIIT can be used with a few different goals in mind - to lose as much fat as possible while cutting or bulking, or to improve aerobic and anaerobic endurance as much as possible. Diet will mostly determine how these goals are achieved by manipulating calories and macronutrient ratios. HIIT during a Cutting Phase: 500 Calories under maintenance daily High Protein (40% of total calories) Low Carbs (20% of total calories) High Fat (40% of total calories) It has been proven in studies that during a low carbohydrate and high fat diet, the oxidation of fat is increased during exercise, especially cardio such as HIIT (more fat is burned). Additionally, fat is a much more highly concentrated source of energy than carbohydrates. "A review by Hultman (1995) found that during a diet where carbs are restricted and a lot of fat is consumed, up to 70% of the energy requirement (even during high intensity activities) comes from the oxidation of fat (where during a high carbs diet, such activities would derive 80-90% of the energy from glycogen)." (Thibaudeau)
Posted on: Mon, 07 Oct 2013 21:44:52 +0000
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