I found this while browsing today. It is always interesting to read and learn about new training methods but this one puzzles me, especially the way it is used with foals...I find it on the verge of inhumane...
Have a look and see what you think:
Official website (including an interview with a vet who discusses the use of the system in researching musculo-skeletal injuries in horses, the orthopedic issues and cardiovascular fitness in horses - look in Media and Scientific Comments): Kurt Equine Training Systems.
And a You Tube video: