CrossFit Undertow is a CrossFit gym in Yaphank, New York focused on helping members achieve fitness and life goals through functional movement. Its workouts draw from gymnastics, weightlifting, running, rowing, and related training methods, with classes structured to review each movement and available scaling options. The gym also offers seasonal CrossFit Kids sessions and hosts children’s birthday parties featuring games, mini workouts, and a final half hour for food, gifts, and a pinata.