I kind of want to try boxing now. Only problem is I'm incredibly slow-moving and all my strength is in my legs, so I'd probably be crap at it.
@ally_nuttall - Kickboxing?
@conflummoxed I dunno they're really fast too.

@ally_nuttall - Underwater kickboxing?

(I accept that this is probably not a genuine sport, but that is only because you have not invented it, yet.)