At 41,  my suggestion would be to get your labs done at see what your test levels are. Heres the reason. Going on steroids shuts down natural test production. So if you know what your levels are before starting, you will know what your best outcome is when you go off and are trying to recover. If you naturally have low levels now, you might want to consider going on HRT. That would be a life long commitment but it would help you get the most out of your training and your life in general. If this is what you did, then when you finish your cycle, instead of doing PCT, you would jsut go back to your normal HRT dose of test and more easily maintain all of your gains. So just a thought. 

For steroid cycles, 8-16 wks is pretty normal, then you want to dial it down, either to HRT or come off. No matter what you want down time so that your organs stay healthy. So if you do not use HRT, after the cycle, you would want to do a PCT and then take an equal amount of time off that you have been on before getting labs to see if you are back to normal. On the other hand, with GH you can stay on year round if you like. This does not have the same impact on your health. 

Looking at this anti-aging cycle, it is less of a cycle and more of an HRT program. 250mg a week is about the high end of replacing test levels and giving you a solid level of GH. This is less of a cycle and more of a lifestyle program. So if you wanted to do it up and acutally make big progress, then go to HRT, I would suggest doing a cycle of 500mg test E or Cyp a week, adex at .5mg EOD. Id do this about 12 wks, then I would either come off and do PCT or I would begin the anti aging "cycle"and stay on it as long as your labs continue to look good. I would get them tested about every 3 months