Well, I want to give you the first 3 of 6 basic facts, but more so the rationale behind our TTN cardio interval madness, better known as the BlitZ.
Fact #1 - Heart is a muscle
Fact #2 - Aerobic exercise is defined as an activity that last for 20 minutes or more and requires oxygen.
Fact #3 - Physiological responses change given proper F.I.T. ( Frequency, Intensity and Time).
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