Lecture 18 - Kin 110Lecture #18 March 10th, 2010 Protein in...

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Kin 110—Lecture #18 March 10 th , 2010 Protein in the diet of athletes may be the most misunderstood concept in sport nutrition. Athletes either OVER emphasize importance in dietary Protein marketed as both food and dietary supplement with “ergogenic” (performance-enhancing) properties. -Popularity of protein supplements reflects ideas that: 1. Protein important for energy production 2. Protein critical component of muscle 3. Many people don’t eat “enough” protein 4. Protein requirements for athletes MUCH higher. (Not necessarily true) Big differences between protein in food (mix of 20 amino acids and other nutrients) and protein as supplements: o Purified so other nutrients removed; e.g. casein or whey protein o Only 1 or a few amino acids; e.g. BCAA’s, glutamine All protein is functional (muscle fibers, immune system, enzymes, transporters, etc.) Not getting enough protein is more serious than not getting enough CHO or fat. Protein is composed of 20 different amino acids, each has a variation on same
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Lecture 18 - Kin 110Lecture #18 March 10th, 2010 Protein in...

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