u/Legitimate_Skin_9779

This may sound like a dumb question but I'm a low intermediate rider, and one issue I've been having with my riding in the canter is not putting enough leg on to start the canter transition+keep the horses in the canter. My trainers keep telling me to put on more leg, but that doesn't help me. Exactly which part of my leg do I need to use, and where does it need to go? Appreciate any help, thanks so much ​