New York City-based personal trainer and exercise physiologist Paul Lauer leads an exercise class at the beach in New Jersey. He never lets anyone in the water early in the season. Instead, he waits until later in the summer, when the water temperature rises to the mid-60s. He also tells his exercisers to drink 16-20 ounces (about two big glasses) of water an hour or so before hitting the beach and to drink constantly while working out.
Expect your body to react differently to a beach workout, says Brazina.
"It's a different training mode," he says. "Walking on soft sand is excellent, but it's a much more difficult workout. ... When running, you're going to have to spend a little more time stretching because it's going to put extra stress on the Achilles tendon [at the back of your lower leg] because of the soft sand."
According to Brazina, these differences are an advantage.
"Your muscles have a tendency to accommodate your workout so if you're doing the same routine all the time, it gets stale, and you don't get the gains a lot of people are looking for," he says. "This is a way to keep things new, fresh, and challenging. It puts the fun back into the workout."