BFL uses an interval training method for cardio similar to that of HIIT, so 20 min of cardio every other day isnt gonna make as much of an impact on your leg muscles as you would think.

you also need to remember that BFL is not a bulking or a cutting workout format. its a combination of both, and doing both at the same time is not an easy task. So some segments will be optimal for one aspect, and not for the other.

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