| I thought this was interesting too.
Because muscle glycogen is the primary fuel source for our muscles. The whole point of the Window of Opportunity post workout shake is to replenish these stores after they get depleted. By replenishing them, we create a positive environment for growth to occur. However, after an HIIT session, it is not feasible to replenish these stores using the same protocol, because insulin spikes in too great of a frequency decreases insulin sensitivity, making the post workout shake much less effective.
When doing cardio, the goal is to metabolize fat for energy. When the cardio is done on too high of an intensity, fat will actually be spared, the primary fuel source coming from glycogen. We need to preserve muscle glycogen for our weight training sessions, rather than using it to fuel us during cardiovascular exercise.
It is my professional recommendation that long duration (30-60 minutes) of moderate intensity (60-70% VO2 max) cardiovascular exercise is optimal for metabolizing fat during a cut. This is the only form of cardio I perform when cutting. On a bulk, it is acceptable to add several HIIT sessions into your routine per week, as you should be taking in such a high level of carbohydrates when bulking that glycogen depletion is not as critical of an issue as it would be on a cut.
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35. A majority of mankind lives in the world without; few have found the world within, and yet it is the world within that makes the world without; it is therefore creative and everything which you find in your world without has been created by you in the world within.
**Master Key System**
Scott
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