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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.
Distance running performed properly is a pushing motion from when the mid-foot strikes the ground. This pushing contributes to the tightness and soreness that can affect the gluteal complex and piriformis muscle. The piriformis muscle lies underneath the gluteus muscle, or buttock. When your glutes and piriformis are tight and fatigued they can cause you to have a sore lower back and hamstrings, poor balance, and even shooting nerve pain down your leg due to sciatica. (Your sciatic nerve shoots through your piriformis. When inflamed, the piriformis compresses this nerve causing the pain.)