Creatine Annotated Bibliography

Topics: Muscle, Metabolism, Muscular system Pages: 2 (548 words) Published: March 19, 2013
What are the positive and negative effects of creatine?

Creatine is a naturally occurring amino acid that's found in meat and fish, and also made by the human body in the liver, kidneys, and pancreas. It is converted into creatine phosphate or phosphocreatine and stored in the muscles, where it is used for energy. During high-intensity, short-duration exercise, such as lifting weights or sprinting, phosphocreatine is converted into ATP, a major source of energy within the human body.Creatine supplements are popular among body builders and competitive athletes. It is estimated that Americans spend roughly $14 million per year on creatine supplements. The attraction of creatine is that it may increase lean muscle mass and enhance athletic performance, particularly during high-intensity, short-duration sports. However, not all human studies have shown that creatine improves athletic performance. Nor does every person seem to respond the same way to creatine supplements. For example, people who tend to have naturally high stores of creatine in their muscles don't get an energy-boosting effect from extra creatine. Preliminary clinical studies also suggest that creatine's ability to increase muscle mass and strength may help fight muscle weakness associated with illnesses such as heart failure and muscular dystrophy. "unversityofmaryland." medicalcenter. universityofmaryland, n.d. Web. 3 Mar. 2013. <\ >.

Creatine is an organic acid made in the human body and used to supply muscles with the energy. It can also be found in foods like fish and meat, or synthesized in the laboratory. International Olympic Committee and National Collegiate Athletic Association (NCAA) have officially approved the use of creatine in the U.S., and the yearly consumption of creatine amounts to almost 9 million pounds. Creatine is used by athletes and people who exercise to improve their performance and increase...
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