For me also, there had been times I worked several weeks from 7am to 23pm and on weekends. This was no problem. The task was clear, it was possible to do (with

For me also, there had been times I worked several weeks from 7am to 23pm and on weekends. This was no problem. The task was clear, it was possible to do (with much overtime) and it had an clear end. Later in my career, on a different job, different position I almost got a burnout, because I thought I could solve some problems with much work. But the problems there had been endless. So there was no chance ever for me to solve all the problems. I asked my boss for a different position in our company. I just realized later how close I was to a very bad burnout. I guess I had also a bit luck and good people around me. [Edit] The job, where I almost got a burnout. The job was empty and they asked me for it, because the person before left with a bad burnout. The person now in this job is now also close to a burnout.