Also known as a Swiss ball or an exercise ball, this workout prop breaks up your routine. Learn exercises and stretches for your workout routine in this fitness video. Take action: keep back straight and abs tight, hold ball in place, while a partner presses down. Tom Clifford, the instructor in this how-to video, has a degree in physical education, fitness and health from Eastern Michigan University, where he ran track and cross-country. Tom has worked as a personal trainer for two years. He also has a separate business where he coaches runners and triathletes for upcoming events. He currently works at Gold's Gym in Wilmington, North Carolina.