Research suggests that moderate aerobic exercise improves the amount we sleep so it can help with sleep deficiency.
The fact that simple stretching for only 10 minutes per day could reduce cancer tumor growth by 52% in this study involving mice is pretty amazing! Being a manual and movement therapy physician, author, and educator, it is clear to me that the human body needs movement. But to see a 52% improvement was incredible!
When working, we place a demand on the body and the body responds by adapting to meet those demands. However, every tissue, has a limit to the mechanical stress that it can accept during physical activity without injury. It would seem likely that the demands of some professions are too great for the human body.