Signals with which the rider aims to instruct the horse. Traditionally, the term refers to signals the rider gives with his/her seat (e.g. tilting of the pelvis, 3 dimensional movement), legs (e.g. encouraging the horse to move forward, away from leg pressure), and hands (e.g. elasticity or firmness of contact to the horses mouth through the reins). However, aids can also be given through the posture of the body (during groundwork, not ridden), voice, or through the use of a whip or spurs.