Question: how many days a week to do cardio bodybuilding?
Answer: Cardio is used by bodybuilders to help increase oxygen flow to muscles and burn excess bodyfat. For best results, cardio should only be performed 3-to-4 times per week, on non-resistance training days. You should increase the length of your cardio session by 5 minutes each week until you reach a total of 30-35 minutes.