The mind-body connection is well-documented in research from neuroscience, psychiatry, and medicine. Researchers at the University of Nottingham has recently found a link between energy and self-control.
The researchers found that self-control and energy are not only intricately linked but also finite, daily resources that tire much like a muscle. Even though we don’t always realise it, as the day goes on, we have increased difficulty exerting self-control and focusing on our daily task. As self-control wears out, we feel tired and find tasks to be more difficult and our mood sours.