Originally Posted by JLx

Janet, thanks for the link. Re changing the time of sleeping, I suspect he meant that going to sleep earlier in the evening lowers cortisol better in the hours before midnight. Getting up earlier forces us to go to sleep earlier. Has to do with circadian rhythm and the natural rise and fall of cortisol in the body, which we tend to disrupt with artificial light at night and just staying up too late. I used to be a night owl; then changed my ways after reading (The Cortisol Connection).