They say you should never go to bed angry, but the better advice may be if you have your argument over breakfast – you're more willing to cope with stress. Researchers from Japan say the body is prepared to produce more cortisol in the morning. The hormone is stimulating; it's part of the fight-or-flight response. Instead of burdening you, it can help you to stay calm in case of frustration (congestion, spitting with a spouse). At night, on the other hand, the body is struggling with the production of cortisol. Commuting feels worse or it is more difficult to solve a problem.
When you feel stressed out, there are many ways to release tension, no matter what happens in the daytime. If you are looking for time for meditation, this can be a great way to relax your mind. Studies show that only one session can produce tangible results. Joining a running group (and exercise in general) is another proven remedy for stress. And if you feel bad at work, it may have something to do with your office layout.