I just posted a new video on my Youtube channel, which explains how you can tell if your dressage horse is bending in the lateral movement shoulder-in. It’s at:http://www.youtube.com/watch?v=yPmTqSBM8k0
So many people draw their inside leg back in this movement, and the shoulder-in becomes a leg yield. Keep your inside leg on the girth in a bending position and your outside leg a couple of inches back where it would be if you were on a 10-meter circle. Then lead the shoulders to the inside by bringing both of your hands in.
Then, have someone check that you have bend by looking to see if the hindquarters stay parallel to the wall. They should stay in exactly the same position that they’re in when you are just going straight down the track. if they’re at an angle to the rail, you’re just doing a leg yield.
In order for your dressage horse to reap all the benefits of the lateral movement, shoulder-in, he must bend. When done correctly, shoulder-in straightens him, strengthens his inside hind, and collects him. For more tips, sign up for my free newsletter at http://www.janesavoie.com