What are some good muscle building exercises that are low-impact and not much strain on legs and joints?
I know hillwork is great but I really don't want a my young horse to be having that strain on his joints. Until he's about 4 I want to just do walking and trotting while building up his muscle and working on refining dressage work. Once his knees close up I'll be introducing jumping (can't wait!!). Yeah he's a little under two years and I have most of his career planned out.