For many jugglers, juggling is like meditation, requiring deep focus and the ability to block out distractions. “Flow”, a concept developed by psychologist Mihalyi Csikszentmihalyi is like a meditative state many people attain when they are doing something they find challenging yet enjoyable. Jugglers likely achieve this state of mind, but so do a lot of other people doing work or hobbies they enjoy. Some of the greatest experiences we have in our lives may happen to us while in the Flow state.
You can read more about this here – Juggling and Flow
Mihalyi Csikszentmihalyi’s book, “Flow: The Psychology of Optimal Experience” is also a worthwhile read, even if his findings aren’t necessarily scientifically testable.
Basically, it should be easier to stay fit or lose weight if the exercise you regularly engage in puts you into a “Flow” state of mind.