Unlike traditional, old-school workouts that feature short bursts of maximum intensity with longer periods of rest, INSANITY flips that formula upside-down.
INSANITY uses MAX Interval Training, which replaces traditional moderate-intensity exercise with maximum-intensity exercise, and trades short intervals of intensity for short periods of rest.
Adding high-intensity exercise forces the body to use fast-twitch muscle fibers not normally engaged in cardio exercise. These fast-twitch fibers continue burning fuel even during lower-intensity exercise.
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