I go to the gym 3 x week to do barbell/dumbell work. I get up at 5 and I'm there as it opens at 6.
But recently, maybe once a week, I get there and feel so exhausted, I either do a shit session or even cut my losses and come home. I feel I just can't lift anything heavy - or anything.
Whilst my sleep is never amazing, it's not any different on the nights preceding those mornings.
I'm nearly 56, post meno.
Thanks!