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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.
Sprint Mechanics All sprinters need to understand and develop solid running mechanics that allow them to use their talent to the fullest. Good running form is the foundation of track and field. Body Mechanics While Sprinting The primary areas that the sprinter needs to focus on are stride length, stride frequency, head position, arm carriage, leg movement, foot plant, foot action, and pelvic alignment: