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		 I'm not sure if it's related but when i was into martial arts a lot more I got to the point that if I were relaxed and thought about a kick my leg would twitch. 
 
I know I used to kick/twitch in my sleep, don't think I do it anymore though. Also it seems to depend on something, cause some nights Ill wake up and my sheets have been kicked off, others I wake in the same position I went to sleep in, so who knows? 
		
		
		
		
		
		
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