I did cardio for the very first time in my life last night. Im 29... I kept my heart rate at 133-139 for 55 min. 4 mph seems to be perfect for me lol. Anyway cardio is not as dreded as people make it out to be. Can I do it for lest say 100 min? or would I start to burn muscle? Im trying to get down to 185 but keep my muscle...Im 205 today...here are my pics in this thread.
http://forums.steroid.com/showthread.php?t=414110
Thanks!!


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. Also, Im trying to keep from burning up any muscle in the process of loosing the fat. I keep looking at my pics from when I was 180 lbs and 6-7& BF to keep me motivated 