American office-goers are getting tired more these days in spite of a reduction in the actual physical labour. While an average office worker does not physically exhaust oneself the way a construction worker or farm labourer would, it is the psychological fatigue that is overpowering these days. In the American culture, high intensity feelings are more valued. They may be either positive ones such as excitement or elation or negative ones like anger of anxiety. In East Asian cultures on the other hand low intensity emotions such as calmness or serenity are more valued. Such high intensity emotions may be good for a while but wears out physiologically over time.Management training professionals must get Americans to seek less intense work pleasures.

Source: https://hbr.org/2016/02/your-high-intensity-feelings-may-be-tiring-you-out