In reply to Rachael Cook:
Hi,
Done it, good luck. I am echoing comments here, but one thing to consider is that the definition of climbing/mountaineering/kayaking/snowboarding as 'extreme' etc is a little outdated, there has been a huge debate out there and they tend to be classed as either lifestyle sports or adventure sports, immediately removing this 'extreme' angle. So, you might want to look up this debate, e.g. authors such as Wheaton, Beal, Thorpe, Horne, etc.
Also, the 1, 2, 5 year band for participants' involvement seems rather random considering that quite often climbing is a lifetime pasttime, so your research categories with regard to experience are getting very skewed here.
Post edited at 00:08