Shelley Hines, Semper Fit Division Head, instructs a group of Marines on what exercises to execute at a battalion physical training session Friday. Hines is thoroughly trained in instructing physical workouts, and is able to conduct section physical training sessions upon request. - Shelley Hines, Semper Fit Division Head, instructs a group of Marines on what exercises to execute at a battalion physical training session Friday. Hines is thoroughly trained in instructing physical workouts, and is able to conduct section physical training sessions upon request.