@Stacey Youlios it keeps your center of gravity exactly where it should be at all times. With biomechanics you learn to move with the horse and not against them, many do the latter out of panic and survival mode and that leads to getting tossed and or injured. Horses can be crafty and sometimes they do pull a weird move that may unseat you but you have a lot better odds to stay on with understanding and using biomechanics.