well if you have low T and ur planning on running test for a very long period of time, you should research blast and cruising. you can do it for the rest of your life if you wanted. theres nop need for pct while doing that, you would start your cycle as normal and once the cycle ends just taper down the dose to about 150mg to 200mg a week, perfefebly test e or c. to cruise on sus would just be silly. but this option is only if you have low T and plan on useing test for the rest of your life. i mean you could run for 6 months and you MIGHT recover but i highly doubt it. tht would need to be an intense pct with high doses and probly 6 weeks instead of 4. but since you are 40 you can consider blast and cruising. so you do your cycle at normal dosages then drop down at end of cycle and cruise for the amount of time your cycle was and then ypu can hit a blast again of high dosages. hope this helps. theres plenty of people who know alot about black an cruising on here, i kno the basics but not in depth info. you can run hcg also while blast an cruising to keep the boys dropped.

Sustanon isn't good for proper first cycle in my opinion. The release of each ester requires more frequent injections. First run cycles are test enanthate or cyp. Their more stable in the body.

Research the forums thoroughly and think hard before you cycle. When im in school for nursing my workouts suffer sometimes. I think with your schedule and intermittant gym times a good solid eating program is more beneficial for you.