I have good health and a fit body now.

*Now* is the demanding word. It rules out waiting for a version of yourself who arrives in April.

Health mostly announces itself in the negative: you notice knees on stairs, a back when lifting, lungs on the last flight. Silence is the sound of things working. Which means most of your good health is happening right now, unremarked, while your attention is elsewhere.

You can go and check. Stand up, walk to the window, come back. Whatever that cost you is a real number, and it is yours today rather than later.