Replying to Relating psychology to skiing

Yeah, gotta write another essay for psych, and I wanna write something relating skiing and psychology, however, my teacher won't let me unless I can find at least 1 source that already relates the two. So, if anybody knows of any articles or essays or books or anything that is even semi related to sking and psychology, or even extreme sports in general and psychology, could you please share?

I'll give you sex...

Or not...

Either way...
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On my way to goddom no more!!!

I suck at life...

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-Aaron