Interval training for horses ?!

I’ve read and heard a little about interval training in horse sports, but honestly, I don’t know much about it. I’m curious to learn more and figure out how it works. Why do people use it, and how exactly do they do it? I wonder if riders and horses work with a timer that beeps—doesn’t that scare the horse?

Here’s what I’ve found out so far, but I’m not sure if it’s all entirely accurate—maybe some of you can clarify or add more details.

Why is interval training used in horse sports?

From what I’ve gathered, interval training (IT) is used to improve a horse’s overall fitness. By alternating between short bursts of intense activity and periods of rest, horses can build stamina and recover faster. This training helps strengthen their heart and lungs, allowing them to handle more intense exercise without getting tired as quickly. Over time, it seems to help them push through longer and more demanding workouts​.

How does interval training work?

The process involves cycles of faster-paced work (like cantering or galloping) followed by slower periods (like walking or trotting). The key seems to be that the horse’s heart rate doesn’t fully return to normal during the rest periods, which challenges their body to adapt. A typical routine might be something like 3 sets of cantering for 4 minutes each, with 3-minute walking breaks in between. It sounds like this kind of training can be done on fields, bridleways, or even in an arena.

Do riders really use timers?

It looks like they do! Timers help riders stick to their planned intervals, but I’m still wondering—doesn’t the beeping scare the horse? Maybe horses get used to it with time, or perhaps there are silent timers or other methods like using heart rate monitors​.
( >>> Dr. Wendy Interval Training for Horses )

If anyone has more insights or tips, I’d love to hear them! I’m still learning and want to make sure I understand how this all works.