My doctor put me on Test-E due to low test levels. I have been working out for over a year. The doctor has me on 500mg every 4 days. I feel great and have some great gains. Do I need to cycle on and off test-e? I have heard several things about receptors and I am not sure if I will need to cycle this or can I stay on this amount for now on? Also, I was thinking of adding a prohormone to the cycle. I am 41 at 215 lbs. I work out 5 days a week at a local gym. Thanks