Sorry, this isn't actually answering your question in the context of today's RN, but didn't we have the Trampoline Ladies World Champion of the late eighties in the RN, or WRNS as would have been then? Not sure if I am allowed to put the name even in this context. (Google could only confirm where she trained, but not that she was actually serving.) I remember visiting the 'old' Temeraire gym before I joined and seeing her training. Apologies if I am taking the thread off track, but even if it was a long time ago, it does show that if you are a good sportsperson in any sport or discipline the RN is likely to encourage you.