It effects more than motivation. Take stress for example. Under stress - e.g., "am I fit enough?" perhaps? - the body releases cortisol. To the best of my knowledge, cortisol has been linked to weight gain. Stress effect sleep, which has system-wide implications. Etc.
The mind is the body and the body is the mind. The Western separation of the two is a myth that should be considered irrelevant at this point.
It effects more than motivation. Take stress for example. Under stress - e.g., "am I fit enough?" perhaps? - the body releases cortisol. To the best of my knowledge, cortisol has been linked to weight gain. Stress effect sleep, which has system-wide implications. Etc.
The mind is the body and the body is the mind. The Western separation of the two is a myth that should be considered irrelevant at this point.