Well that is when I am at work. My work times are clearly defined and when the time is over, I go home. So I am limited to about 8 hours in a day, with a very rare exception of 15 minutes longer.
After work and in the weekends I still have time to chill, but at work I have no downtime except for breaks. Luckily my boss also knows how busy we are and doesn’t complain if I cannot get everything finished, he just tells me what is a priority and what not.
That is really helpful for the stress levels, but it is still a pretty stressful job.