Thanks for the ideas, Renholder. I think I’ll look in to melatonin. I’m not that distressed by the sleep disruption itself - although there is some relationship between low T and sleep.
The overtraining possibility has occurred to me - although I never experienced signs that many folks equate with overtraining. This would be a tough one for me to address, and if I don’t want to wind up in a padded room changes would have to come in baby steps.If I am able to confirm that I have a cortisol issue, I’ll have to force myself to move toward higher intensity but shorter workouts. (Although it’s the right thing to do anyway, it does not a very appealing prospect at my age!)
At some point, I will have some forced time off from the gym to correct a hernia, and eventually an even longer hiatus if I break down and fix a shoulder issue. Not looking forward to either "vacation," but maybe it will be part of a reset process.
Melatonin is worth checking out. I assume you do not have sleep apnea? Could be worth looking into, as that may cause low testosterone.
The myth of the eight-hour sleep - BBC News
Why is it important for you to train 5 times a week with weights for extended periods of time? Are you convinced that less is not more? For me less is far more, but I had to severely overtrain my body before discovering it (and I suspect that period may have done permanent damage to my body and explain my problems today).
Not overtraining and holding workouts below the one hour mark is one of the things recommended for cortisol reduction. Now, you don`t know if you even have abnormal cortisol yet, so I`m just throwing it out there.