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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.
Sprinters typically have more definition to the tone in their legs and abs than distance runners. This is because sprinting targets six specific muscle groups: hamstrings, quadriceps, glutes, hips, abdominals and calves.Sprinting is a total body workout featuring short, high-intensity repetitions and long, easy recoveries. To sprint means to race or move at full speed, according to Health and Fitness Solutions.his is known as a hip extension. When the foot strikes, the hamstrings and quadriceps co-contract to stabilize the knee during ground contact; then, as the leg pushes off, the hamstrings help with forward propulsion. These muscles also assist in stabilizing the body while sprinting.