Hiam D, Patten R, Gibson-Helm M, Moreno-Asso A, McIlvenna L, Levinger I, et al. The effectiveness of high intensity intermittent training on metabolic, reproductive and mental health in women with polycystic ovary syndrome: study protocol for the iHIT- randomised controlled trial. Trials. 2019 Apr 16;20(1):221. https://doi.org/10.1186/s13063-019-3313-8