IT WAS MY SECRET. When I decided to try out to be a beach lifeguard, I kept it to myself. Fifty years and 40 pounds had added up since the last time I’d held the job, and I wasn’t sure I could get fit enough to pass the running and swimming tests. In Sea Isle City, the Jersey shore town where I’d worked for four summers starting in 1972, there are no separate tests for lifeguards over 60. You have to be as fit as everyone else. For me, it seemed like it might not be possible—it might be almost laughable. But I wanted to try. I was getting ready to retire from my job as a hospital anesthesiologist, and I wanted a challenge.