I have read in multiple places and anecdotally from many folks that low T causes poor sleep. The commonalities and frequency of in particular men stating that when they had low T the woke up between 3 and 4 AM was staggering to me. It not only was poor sleep or sleep disturbances. But the focus on 3-4 AM was very common specifically.
I know that natural T production for men they get a burst of T in the morning. Does anyone know how early in the morning that burst of production takes place? It would be amazing if that burst occurs at about 3 to 4 AM and may explain why if that burst is too low, that sleep disturbance occurs around that time.
Also at least my experience again anecdotally even whe I was young was “old people” were always extremely early risers. It always seemed odd that when retired and had all the time in the world to sleep in and they are up before the sun. But when young was always hoping to sleep in. I wonder now if this has to do with the depletion of T with age. And when they wake up due to low T at 4am they simply stay awake!
I know that when younger I had no problems sleeping. Now as my T levels have decreased, I do find myself waking and looking at my clock. And interestingly, it is almost exclusively between 3 and 4 am when I awaken. Hummmm
Also it seems like many people sleep improves when they get proper hormone levels. This includes thyroid as well as testosterone and I suspect cortisol as well. Cortisol also has a wake response burst or peak early in morning but generally occurs about wake time in the 7-8am or so range.
to me this might be the chicken or egg scenario. I am not sure if low T causes poor sleep or rhe other way. But I suspect it is a negative cycle. Once one gets out of balance, I think the negative spiral build momentum.
My understanding is norepinephrine, cortisol, testosterone, and other hormones (though probably not all of them) peak together at around 6:00 am for the healthy circadian rhythmed person. The sleep disturbances and especially the early morning awakenings could be a combination of a slightly off-kilter circadian rhythm and the burst of norepinephrine magnified and/or improperly moderated by low testosterone, cortisol, and/or thyroid function, all of which are essential for managing norepinephrine and therefore the entire stress response cycle.
The 4 am wakings were downright freaky for me. There was a period for perhaps a year where I would wake and see it still dark out and be like, "okay, this time surely it's at least 5:00 am," and sure enough it was within five minutes of 4:00 am EVERY TIME.