Trotting

The trot is a two-beat diagonal gait of the horse where the diagonal pairs of legs move forward at the same time with a moment of suspension between each beat. It has a wide variation in possible speeds, but averages about 8 miles per hour (13 km/h). A very slow trot is sometimes referred to as a jog. An extremely fast trot has no special name, but in harness racing, the trot of a Standardbred is faster than the gallop of the average non-racehorse, and has been clocked at over 30 miles per hour (48 km/h).

June 29, 2014 at Pocono Downs in Pennsylvania the Swedish standardbred Sebastian K ran a mile in 1 minute, 49 seconds (quarters were passed at 26:2, 55:3 and 1,21:4). This is equivalent to a 1000-pace in 1.07,7 or 53,14 kilometers per hour or 33 miles per hour.

From the standpoint of the balance of the horse, the trot is a very stable gait and does not require the horse to make major balancing motions with its head and neck. Due to its many variations, the trot is a common gait that the horse is worked in for dressage.

Eadweard Muybridge was the first to prove, by photography, in 1872 that there is a "moment of suspension" or "unsupported transit" during the trot gait.

Depending on the amount of engagement and collection of the horse, the trot can generally be classified as "working", "collected", or "extended". By the rhythm, one may distinguish a true, two-beat square trot when each diagonal pair of hoofs hits the ground at the same moment from a four-beat intermediate ambling gait, such as the fox trot or the "trocha" sometimes seen in the Paso Fino.

Different speeds and types of trots are described by the following terms:

Two variations of the trot are specially trained in advanced dressage horses: the Piaffe and the Passage. The Piaffe is essentially created by asking the horse to trot in place, with very little forward motion. The Passage (rhymes with "massage") is an exaggerated slow motion trot. Both require tremendous collection, careful training and considerable physical conditioning for a horse to perform.

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Wikipedia