You'll need a horse, riding gear, and a helmet. Most riding schools will let you borrow these. Pick the horse that's right for you. If you're a beginner, go for a horse that is five-years-old or older—they are calmer and give a smoother ride. Your helmet has gotta be ASTM-F 1163 standard and SEI certified, and on right! If your hair is long, tie it up. Wear clothes that aren't baggy or loose, make sure to button them up, and leave your jewelry at home.
You don't want to get caught on stuff. Your pants should let you throw your leg over the horse when you're getting on. If it's cold out, wear a long-sleeved shirt with a jacket or sweatshirt on top. Waterproof jackets aren't good because the noise they make could spook (scare) your horse. Riding gloves will stop the reins from slipping out of your hands. Wear hard-toed leather boots or shoes that completely cover your ankles and have heels (not sneakers).
Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435