Jacobs joined an exercise class in Central Park that embraces the Paleo movement, also known as the caveman movement. It stresses that participants should eat a diet similar to that which a caveman would have enjoyed, such as a lot of red meat, and exercise outside. Jacobs participated in a workshop run by the creator of the movement, a man named Erwan Le Corre from France. The Paleo workout included running, moving on all fours along a log, and later carrying the log on the participants' shoulders. Jacobs said he admired some aspects of the caveman workout. "I have to concede that Erwan has a point about exercising under the sky," he wrote.