Minus Pool

A pari-mutuel pool – typically a show pool - where one horse is so heavily bet that after deductions there is not enough money left to cover the prescribed minimum on each bet.

Workout

A workout is a timed sprint over varying distances prior to a race, meant to get a horse fit enough for competition.

Exercise Rider

A rider built much like a jockey but is employed for exercising and working out horses in the morning.