Hey, everyone! I'm just beginning to lease a horse that I will probably own in the end (if the PPE goes well and we're still good together). I only just checked him out yesterday and I fell in love. The downfall is that he's a bit underweight and lacks muscle because he hasn't really been worked since they've been using their already-trained and experienced horses. So I was wondering what type of exercises (and about how long) would be beneficial to help build up his muscles and topline.
I already know about doing hill work but what other things can I do?