This paper considers the relevance of human genetics as a case study through which links between bioethics and sport ethics have developed. Initially, it discusses the science of gene-doping and the ethics of policy-making in relation to future technologies, suggesting that the gene-doping example can elucidate concerns about the ethics of sport and human enhancement more generally. Subsequently, the conceptual overlap between sport and bioethics is explored in the context of discussions about doping. From here, the paper investigates the ethics (...) of gene-doping, arguing that a straightforward mapping of medical ethics onto sport ethics is not justified. In conclusion, it argues that gene-doping is consistent with a broader ethics of enhancement within elite sports. Moreover, the increased legitimacy of lifestyle medicine in society is likely to reduce the relevance of an anti-doping programme that is concerned with protecting the integrity of an alleged natural athlete. (shrink)