Marcy Peters is a renowned biomechanics expert. A physiotherapist, licensed Trainer A instructor and judge for dressage and show jumping, she gives lectures and seminars throughout the world, including at the prestigious German Riding Academy in Warendorf. She is a native of England where she competes at the international level. She is the author of two books on the biomechanics of riding: Your Friend, My Friend and Seat, Legs, Hands.