I like to think that in this day and age things are equal, it's not like other sports where men have an advantage, such as Javelin/Shot Putt etc. Tube challenging requires more of a mental skill in working out the optimum route, researching door positions etc and when on a challenge, anyone can run or hold a door, there shouldn't be a division and I don't really understand how it has come about....
Anyways.... mind just went off on a tangent!!