The downside is that due to years of Dunder Mifflin Inc paper company Ugly Christmas tshirt, my left side apparently got used to doing more of the work than my right, especially in my core. I now get pain in my right side because the muscles are having to work harder than they ever have before. I also do still get some pain in my left shoulder – I do have terrible posture! I’m a Masters student, and I spend a lot of my time hunched over a desk. However, these problems can be sorted with stretching and by strengthening my core. And apart from a brief period when I overworked myself before I realised what was wrong with my right side the pain never gets near the agonising level it did in my left shoulder. That’s true for some people, but for others it can be extremely debilitating.