Still a short few years shy of 60; but hoping to become one of those weatherbeaten 75 year old sailor guys. Last spring, anchored in a cove in the Spanish Virgins, we met a couple who were on their 13th year of a world cruise; having launched themselves onto the oceans after age 65 retirement. Pretty inspiring for me (if not my spouse!).
My plan right now...stay fit for sailing, and sail to stay fit.
Great Lakes, Canada