Most of us treat an energy deficit as a problem to be corrected — a state where you’ve fallen below a known requirement, risking lost muscle and blunted performance. Areta’s reframe: think of it as energy stress. Like exercise stress, it’s a signal the body is built to adapt to, and — at least as a working hypothesis — one you may get better at handling with repeated, progressive exposure. We evolved under intermittent scarcity, and a body that responded to hunger by becoming weak and slow wouldn’t have survived to find its next meal. The practical hook for the older athlete: if you’re always in a calorie surplus to recover and build, you’re adding fat alongside muscle. Energy stress, used deliberately, becomes the tool for managing body fatness without sacrificing the performance and muscle you’ve worked for.