Nutri Sci Lecture 5

Nutri Sci Lecture 5 - Lecture 5 Carbohydrates 2 Why Do we...

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Lecture 5: Carbohydrates 2 2/3/10 Why Do we Need CHO? CHO provides energy 4 Kcal/gm Our body depends on CHO & fats for daily activity Light activity = 88% fat, 13% carbs Moderate activity = 55% fat ,45% carbs Intense activity = 33% fat, 67% Carbs Carbohydrates Loading athletes increase glycogen stored in liver & muscle delays fatigue during strenuous physical activity longer than 60 min. must begin 7-8 days prior competition Unhealthy Trends in US CHO Consumption most americans eat too few fiber-rich CHO adequate dietary fiber for men = 38 g/day, women 45 g or 14g / 1000 calories per day us consumption is about 12 – 18 g fiber too much simple sugar Avg. CHO intake = 50% of energy of total intake sources of simple sugars = fruits, milk, pies, cookies, fruit drinks, candy\ added sugars: cola soft drinks US consumption is 267 cup of sugar / year. (16420 g sugar!) Health Problems Assc. With Simple Sugars Dental cavities NOT hyperactivity in children
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