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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.
Rating Newest Oldest. Sprinting works quads, hamstrings, glutes and calves. They all need to be strong or balance each other because if one is weaker than the other then you could injure the weaker one due to the strain/pressure put on it by the stronger muscle.ating Newest Oldest. Sprinting works quads, hamstrings, glutes and calves. They all need to be strong or balance each other because if one is weaker than the other then you could injure the weaker one due to the strain/pressure put on it by the stronger muscle.