Horse racing speed and sectional data speed and stride data explained

How does speed and sectional data tracking record a British race?

Each runner carries a small speed and sectional data tag in its saddle cloth that records its position several times a second. The positions are processed into speed, sectional times, the distance covered and, where the data allows, stride measures.

The tag turns every race into a detailed trace for every horse, not just the leader. From the trace come sectionals for each furlong, the horse's top speed and where it reached it, how much ground it covered compared with the winner and how its speed changed from start to finish. RaceWatch holds speed and sectional data speed data for the British courses in its feed from January 2025; Irish racing is not covered.

How does a horse's speed change through a race?

A horse accelerates from the stalls, settles into a cruising speed, then either quickens or slows through the closing stages. The shape of that curve shows how the race was run and how the horse handled it.

In a sprint, horses reach top speed early and spend the rest of the race trying to hold it, so the finish is about who slows down least. In a middle-distance race run at a steady pace, speed builds through the final three furlongs and the best finisher records the highest late speed. A speed curve makes these patterns visible at a glance.

Comparing a horse's curves across several runs is where the data earns its keep. A horse that reaches a similar peak speed every time but fades at different points is telling you about trip and pace, while a horse whose peak speed keeps rising is improving. The same comparison exposes horses whose best runs all came when the race was run to suit them.

What is the difference between stride length and stride frequency?

Stride length is how far a horse travels in one stride, and stride frequency is how many strides it takes each second. Speed equals stride length multiplied by stride frequency.

A horse covering 7.2 metres a stride at 2.4 strides a second is travelling at about 17.3 metres a second, close to 39 miles per hour. Horses reach similar speeds in different ways: some have a long, raking stride, others a shorter, quicker action. Neither is better on its own; what matters is how well a horse keeps both going when the pressure comes on.

What does stride data show when a horse tires?

A tiring horse usually shows its stride frequency dropping or its strides shortening in the final furlongs. Stride data can pick up that decline before it shows in the finishing position.

A horse that holds on to finish second while its stride shortens sharply in the last furlong is at the limit of its stamina at that trip. A horse that keeps its stride length and frequency to the line, even while beaten, is likely to stay further. The same measures help judge whether a step up or down in trip makes sense.

• Stride frequency falling late: tiring
• Stride length shortening: tiring or hating the ground
• Both held to the line: likely to stay further
• Top speed reached early: a sprinter's profile
• Top speed reached late: a horse with a turn of foot

How much ground do horses lose racing wide?

A horse racing wide around a bend covers more ground than one on the rail, and speed and sectional data measures the difference for every runner. Over a race with two bends, running wide can cost several lengths.

Each extra metre covered at around 16 metres a second costs about a sixteenth of a second, and a length is only around two and a half metres. A horse that covered 15 metres more than the winner and was beaten two lengths may have run the best race of all. That is one of the most useful things tracking adds to a result.

Which British races have speed and stride data?

Every British racecourse now has speed and sectional data tracking, and RaceWatch holds speed data for the British courses in its feed from January 2025. Irish races have no RaceWatch speed and sectional data data.

RaceWatch data grows every week as new meetings are added, so the number of horses with a full speed profile keeps rising. For horses whose form is mainly Irish or from before 2025, race comments and finishing times remain the main evidence, and the sectional times guide explains how to read what is available.

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