In reply to koalapie:
Thanks, not my specialty either... I totally agree that the training regimes for gymnasts, especially for young girls, that are required to achieve international success are completely insane.
IMO it would help if the indivdual exercises required in womens gymnastics would be modified so that they were more easily achievable for a young adult rather than a child. Simply compare it to men´s gymnastics: The strength elements alone ensure that a 12 year old would have no chance of being competitive, and most gymnasts reach their peak in the early 20s. No idea how to do this, but certainly worth thinking about.
As to climbing, I believe it would be possible to find or set a route that was climbable for a 13 year old girl but noone else (crimpy stuff that really emphasizes power to weight rather than pure power or endurance). Just as easily one could find/design other routes where the same climber would fail miserably.
One would not even have to think about mountaineering, with hours of faffing with ropes in the cold or breaking trail through the snow... Even for sports, think of flaring cracks that would be a wide handjam for a grown up man but horribly offwidth for a young girl, or long overlaps that would force her to dyno where he could reach out statically.
CB