Synchronized beach goers as far as the eye could see tone up in the morning summer sun on the sands of Ocean City, New Jersey, in August, 1933. Under the direction of Elmer E. Unger (seen taking a knee at the bottom right) calisthenics groups like these were a popular form of exercise before private health clubs became commonplace.

When this published in the Mid-Week Pictorial, The Times reported that these vacationers were performing the "daily dozen," a famous 12-step aerobics plan popularized by Walter Camp, a Yale football coach in the 1920s. It was said he devised it after watching a tiger stretch and twist it's body at the Bronx Zoo.