I had a question towards cardio and its importance with bodybuilding. I read on the forums here that cardio was essential when taking anabolic's (20 minutes at least 3-4 days a week). It got me to thinking is cardio necessary while still lifting naturally? For myself personally i do not care about adding additional fat to my body, i'm already consuming near 4000 calories a day at 5'7 165 pounds. So, in conclusion would running be advised while still lifting naturally?