A few stats: I am 44, 225 lbs, bf 15%, on hgh for life (currently 10 Iu's eod) also on trt 250 mgs Test E per week. Since January I have lost 31 lbs and my bodyfat had dropped over 15%. This has all been very positive, but my question is as my lbm has continued to increase my ability to do cardio has diminished to the point where I can only run 2-3 minutes even at 5 mph. lately I have been running 1 minute 3.5 mph and then 1 minute 6 mph. I have a resting heart rate of 74 and when I do cardio I keep it around 130-140. Why the decreased air to do cardio?