Harness racers may be called Harness horses as a general term. They have two gaits, the pace and the trot. Trotters trot, and Pacer's pace. They could also be called by their individual breeds. In the USA only the Standardbred is used for racing. In other countries they have other breeds such as, but not limited to, Orlov Trotters, Russian Trotters, French Trotters and a few others.
A horse's harness is called a bridle. It includes the headgear that allows the rider to control the horse by connecting to the bit in the horse's mouth.
Generally it is only purebreds that race since you have to register them and everything.
The tack.
The rider of a horse in a race is called a Jockey.
It's a trotter.
There's harness racing and flat out racing.... Flat out racing is most common in thoroughbreds, appaloosa's and quarter horses. Harness racing is saddlebreds.
A steward.
does a horse pull a cart with the harness, or does a horse push the cart with harness from the front
These types of races are ran with the horses harnessed up to a 'sulkie', a lightweight 2-wheeled cart. Unlike other types of horseracing, the harness races are all ran at a fast-paced trot. If the horse 'breaks' from the trot he is disqualified.
A person who rides horses (mainly thoroughbreds) is called a Jockey
Marie Hill has written: 'Single G; the horse that time forgot' -- subject(s): Single G (Race horse) 'Gentleman Joe' -- subject(s): Biography, Harness drivers, Harness racing
It means that the horse has the correct qualities needed to be a harness horse.