The "four" 20-meter pole exercise is a more advanced version of the exercise that uses a much longer and faster stride. Practice the 20-meter pole exercise in four, five and six strides with helpful tips from an experienced Grand Prix rider in this video on horse exercises.
Now I will attempt the Four, that'll be extremely long, extremely forward and I will try to do it, without it looking any different than it did, when I was doing the Six. There, so when you have a big oxer out of the corner and you need the extra power to get to the back rail. If you carry a higher speed, it's much easier on the horse. So this is an exercise you can do at home by yourself. It's a great tool to fine tune your eye.
Specialty: Grand Prix Jumper