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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.
If you are looking to improve the endurance of your upper body, bodyweight exercises such as chin-ups, push-ups, triceps dips, etc., will improve this, and your strength as well. Muscular endurance is very important for people playing sports and who have to sustain an activity for long periods of time.Muscular endurance is determined by how well your slow twitch muscle fibers are developed. In case your wondering what slow twitch muscle fibers are, I will explain.f you are looking to improve the endurance of your upper body, bodyweight exercises such as chin-ups, push-ups, triceps dips, etc., will improve this, and your strength as well. Muscular endurance is very important for people playing sports and who have to sustain an activity for long periods of time.