There are endless alternatives. Here are just a few. When Ortiz sits in his elevated lifeguard station, as far as his eye can see, people are engaged in myriad fitness activities. Here are a few he recommends. Running Choose your terrain, choose your level of workout.
Lifeguards know all about running.
To avoid serious soreness the next day, Sprague recommends that you start slowly and don't overdo soft-sand running. You can even run barefoot, provided it's not rocky. But know your beach before heading out without shoes, he advises. If running in the sand is a bit too hard on your joints or calves, slow it down. Or walk vigorously along beachfront walkways.