Stretching the hamstrings is important when weight training the legs or before exercising or sports. Learn how to do standing hamstring exercises in this stretching and flexibility video. Take action: cross right foot in front of left leg, bend down in front and exhale, switch feet and repeat for other leg, remembering to keep knees straight. 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. Watch this video exercise tutorial from Live Strong and learn how to do a standing hamstring stretch.