Lecture 10 - Need 2600 total kcal energy Performance can be...

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Friday February 12 th , 2010 Kin 110 –Lecture #10 1. Are energy bars necessary before exercise because you need more energy? If not, why not? No you do not because a person already has >50, 000 kcals stored energy (enough to run 500 miles of running) Carbohydrate supplies energy during exercise. 2. What might you need before exercise? Why? Carbohydrate is the most important supply of energy(ATP) during exercise. CHO supplies at least 50% of the energy for almost every exercise task 3. What does the graph below tell you? As exercise gets harder, % energy from CHO. Anything harder than walking uses mostly carbohydrate for energy. 4. How much carbohydrate can you store? Where is it stored? How many miles could you run if ALL of the energy came from stored carbohydrate? Starting with the biggest possible supply of stored glycogen might be helpful. o About 300 grams in muscle=1200 kcal o About 75 grams in the liver= about 300 kcal So only 1500 total carbohydrate kcal stored.
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Unformatted text preview: Need 2600 total kcal energy Performance can be limited by CHO supply People who exercise regularly need to eat a lot of CHO to replace what is used. 5. What are the big differences between energy bars and real food like a peanut butter sandwich? Energy bars are easily digested carbohydrates and more ingredients added for marketing. Snickers bar has less protein but about the same as the energy bar. No statistical difference. 6/6 people went longer with powerbar. 6. What was the big take-home point from this lecture regarding eating for athletic performance vs. eating for general health? MOST studies show no added benefit to energy bars compared to real food besides (a) being conveniently packaged and (b) slightly lower in fat than most candy bars Food designed specifically to aid athletic performance are not necessarily healthy as a large part of your habitual diet....
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This note was uploaded on 10/19/2011 for the course KIN 110 taught by Professor Lass during the Spring '08 term at UMass (Amherst).

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Lecture 10 - Need 2600 total kcal energy Performance can be...

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