Horse riding posture is often reduced to instructions like "shoulders back" or "open your chest," but forcing your shoulders backward creates unwanted tension rather than a relaxed position. Instead, a simple rotation of the upper arm can open the chest and draw the shoulders back naturally, without any force at all. Below we walk through a quick exercise you can practice on the ground before applying it in the saddle, so you can ride with a more balanced, relaxed position. All equestrians have likely heard the words ‘shoulders back’ or ‘chest open’ (and perhaps other more entertaining lines!) during their journey to becoming a better rider. But what does this really mean, and how can riders achieve this without adding negative tension to their position? Interestingly, the answer to this question came to me during a yoga class! While helping students achieve correct posture during downward dog, the instructor demonstrated how to open the chest through a simple rotat...