It is recommended to do cardio 3 times a week at 30 minutes each session. If you have a really intense training session that goes on for longer than 30 minutes then that can take the place of it. Invest in one of those heart rate monitors and try to keep your heart rate at 60-70% of your maximum heart rate for 30 minutes. If you are achieving this during your normal routine then that's great.
__________________ "I have found the Iron to be my greatest friend. It never freaks out on me, never runs. Friends may come and go. But two hundred pounds is always two hundred pounds."
-Henry Rollins |