- Running : Background - To know: Scientific research has demonstrated that sprinters and marathoners have predominantly different muscle fiber types. Sprinters will have fast-twitch muscle fibers that create greater force and bear a faster contraction or response time. Marathoners have slow-twitch muscle fibers that create force slowly and remain...
            - Running : Background - To know: Scientific research has demonstrated that sprinters and marathoners have predominantly different muscle fiber types. Sprinters will have fast-twitch muscle fibers that create greater force and bear a faster contraction or response time. Marathoners have slow-twitch muscle fibers that create force slowly and remain...
            
           
		  
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