What is meant by a four-beat walk?

The four-beat walk is the correct footfall pattern of the walk gait, and understanding what it means gives you a precise diagnostic tool for evaluating the quality of your horse's most fundamental gait. In a true four-beat walk each of the horse's four feet strikes the ground individually and separately in a consistent, evenly spaced sequence — left hind, left fore, right hind, right fore. Each footfall is distinct and audible as a separate beat, and if you count them the rhythm is one-two-three-four, one-two-three-four, with equal time between each beat. That even, four-beat rhythm is the hallmark of a correct, relaxed, through walk, and any deviation from it is a signal that something in the horse's training, physical condition, or way of going requires attention. The most common deviation from the four-beat walk is a lateral or pacing walk — where the two legs on the same side of the horse move nearly simultaneously rather than in the correct diagonal sequence. Instead of left hind, left fore, right hind, right fore, you hear left hind and left fore nearly together, then right hind and right fore nearly together — a two-beat lateral rhythm. This lateral tendency in the walk is almost always created by the rider — specifically by rein tension that restricts the natural swing of the horse's head and neck. The horse's head and neck nod naturally with each stride, and when a rider holds a fixed contact that prevents the natural head nod, the timing of the footfalls is disrupted and the lateral tendency develops. A four-beat walk that has become lateral through years of incorrect work is one of the most difficult training problems to correct precisely because the walk has no suspension phase to work with. Correction requires removing the sources of tension and restriction, returning to a free, forward walk on a loose rein until the four-beat quality returns, and then very gradually reintroducing contact while carefully monitoring whether the four-beat quality is being maintained. The walk cannot be collected directly — it can only be collected indirectly, through the development of the horse's overall throughness and carrying capacity, and any attempt to collect the walk through direct rein pressure is more likely to destroy the gait quality than improve it.