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If that promotes the development of fast-twitch muscle fibres in growing foetuses, that could add to the Jamaican edge. The truth is, we donât have enough information to draw firm conclusions about the Jamaican dominance of sprinting. But there is good reason to dig deeper â and it has nothing to do with athletics. We now have evidence that extreme stress, heat, cold, malnutrition and pollution (including tobacco smoke) trigger changes in the way genes are activated or silenced.
Sprinting requires power that involves numerous muscles -- and not just leg muscles -- that help you cover distances typically ranging from 60 to 400 meters in the shortest possible time.he four quadriceps muscles in the front of each thigh are primarily responsible for extending your knee. When your foot moves forward and your leg straightens during your sprinting stride, that's the quadriceps hard at work.