It is a common viewpoint that ego stunts personal growth, and most would agree that ego undermines our effectiveness as coaches and practitioners. What is less often considered is that unconstrained ego similarly obstructs progress and discovery in the areas of scientific study that exist to inform practice. At present the respective disciplines encompassed within coaching science, sports science and sports medicine are plagued with these difficulties. Einstein famously quoted to the effect that ego has an inverse relationship to knowledge – “more the knowledge, lesser the ego; lesser the knowledge, more the ego”. Yet researchers in the fields of sports science and sports medicine are showing themselves to be particularly prone to ego and the excesses associated with it. In this post we tackle the issue of ego in sports science and sport medicine, and attempt to plot a path back to sanity.