Why+are+some+races+or+ethnicities+better+at+running?

__**WHY ARE SOME RACES OR ETHNICITIES BETTER AT RUNNING?**__

Answer the question below, append new answers to the top of this page. _ __Response 1:__ Sehej Shergill 8.3 Wednesday February 22nd 2012
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Every day athletes are breaking records and raising the bar in sports performance, but there must be a limit. Most physiologists believe that genetics, more specifically genes, lead to the limit in cardiovascular endurance. Aspects such as different nutrition, motivation, environment and different equipment can lead to the variation in sport performance. Before I get started, I would like to slightly change the question to: //Does Genetics Affect Athletic Performance?// Genetics shape us in different ways, they give us some advantages and some disadvantages. One of these advantages and/or disadvantages is sports performance. Sports performance can vary based on genetics. Genetics have a large impact over the strength, muscle, size and muscle fibre composition. It can also affect flexibility, lung capacity and to some extent endurance. One major limitation for endurance athletes is cardiac capacity, or the heart's ability to gather enough oxygen for the skeletal muscles in order for them to keep going. This is also greatly determined by different genetics. Another limitation for endurance athletes is the ability of muscle tissue to proficiently use O2 and create what is called ATP (Adenosine Triphosphate). ATP is the fuel that allows muscular contraction and movement within the body. In conclusion, I found that genetics can and do affect the physical performance of an athlete. 

Key Terms: - Genetics: The study of heredity and the variation of inherited characteristics. -Adenosine: Adenosine is the high-energy molecule that stores the energy we need to do just about everything. - Cardiovascular: Of or relating to the heart and blood vessels. - Composition: The mature of somethings ingredients or constituents; the way in which a whole or mixture is made up. - Endurance: The fact of power enduring an unpleasant or difficult process of situation.

Bibliography

Quinn, Elizabeth. "Genetics and Athletic Ability - How Genetics Influence Athletic Ability."//Sports Medicine, Sports Performance, Sports Injury - Information About Sports Injuries and Workouts for Athletes//. N.p., 9 July 2009. Web. 23 Feb. 2012. .

"Usain Bolt." //All Sports Everything//. N.p., 13 Feb. 2008. Web. 22 Feb. 2012. .

"Social Psychology of Sport Lab." //U-System Unix Information//. N.p., 24 Sept. 2007. Web. 23 Feb. 2012. .



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