hey guys whats a good amount of cardio to do during the week.should you do it on off days that your not lifting..i hear alot of guys saying when your trying to put on some good amounts of muscle you shouldnt do alot of cardio maybe 3 days a week..i try and do my high intensity cardio on my off days like running on the treadmill or spinning..the only problem with the spinning is it really destroys my quads for a day or too..running doesnt bother as much as the spinning..also heard alot of guys that say do cardio before working out and others say afterwards