Triceps curls target the muscles at the back of the arm, building muscle mass and toning. Learn how to do triceps curl exercises in this strength training video. Take action: extend arm above head & elbow at 45 degrees, move slowly, lower weight and extend up, fix your upper arm in place, and lift to 7/8 of full extension. Tom Clifford, the instructor of 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 weight-lifting tutorial from Live Strong and learn how to do tricep curls with dumbbells.