I ride horses competitively sometimes, it's also known as dressage.
That is very cool. It looks very fun.
It's considered a very honorable and prestigious sport, also known as the highest expression of horse training.
I did not know that. How long have people been riding competitively? 
I'm not sure exactly, but I think the history is long. It's even a sport at the Olympics and World Equestrian Games.
What kind of equestrian events are there in the Olympics?
Right now the current disciplines are dressage, eventing, and jumping.