Treat your body like a partner in the plan rather than transportation for the brain.

Thinking of yourself as a mind with a vehicle attached leads to treating hunger, tiredness, and stiffness as interruptions to negotiate away. A partnership works differently. It has terms, it involves listening, and it produces far more over a long period than the arrangement where one side simply issues demands until something breaks.

Try consulting rather than commanding for a week. Before committing to something demanding, ask what condition you are actually in. Then plan accordingly rather than assuming the answer will be yes.