Empirically, my best output p/hour will peak with 35h/week. More than 40h/week and I start to feel overworked. I did also manual labour and the feeling wasn't v

Empirically, my best output p/hour will peak with 35h/week. More than 40h/week and I start to feel overworked. I did also manual labour and the feeling wasn't very different. The difference is that instead of feeling mental tired you feel mental bored.