They say never go to bed angry, but the better advice may be to have your row at breakfast—you’ll be more prepared to deal with stress. Researchers from Japan say the body is primed to produce more cortisol in the morning. The hormone is energizing; it’s part of the fight-or-flight response. Rather than stressing you out, it may help you stay level-headed amid frustration (traffic jam; spat with a spouse). At night, on the other hand, the body struggles to produce cortisol, which may be why your p.m. commute feels worse, or it’s harder resolve a problem.
If you do find yourself feeling stressed, there are plenty of ways to help ease the tension, no matter what time of day it is. Making time for meditation can be a great way to relax your mind—and studies show just one session can have noticeable results. Joining a running group (and exercise in general) is another proven remedy for stress. And if you’re feeling frazzled at work, it might have something to do with your office layout.