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Carbohydrate: Energy
built 233 days ago
Fiber is ... a type of carbohydrate but it has a different chemical make-up. Humans do not have the enzymes necessary to break down this type of carbohydrate. Therefore it is not digested and provides no calories or energy. Fiber gives the bulk to the intestinal contents and aids in normal elimination.
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"Compared to white bread, eating the low-carbohydrate bar lowered insulin by about a quarter. Insulin levels rose by more than a third after participants ate the moderate-carbohydrate energy bar, and increased nearly three-quarters after eating the high-carbohydrate energy bar. Eating chicken caused the lowest insulin response – resulting insulin levels were more than three-quarters lower than those caused by white bread."
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A continual supply of carbohydrate in the diet each and every day diet is necessary to ensure an adequate supply of energy to support physical activity. For example, one carbohydrate rich meal before exercise will not greatly impact the performance if all other meals eaten in the days and weeks before are inadequate in carbohydrates.
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National survey data for Great Britain found the average daily intake of carbohydrate was 275g for men and 203g for women. This represented 47.7% of food energy intake for men and 48.5% of food energy for women. As can be seen from Figure 2, cereal and cereal products were the main source of carbohydrate for adults in Britain (including 21% of carbohydrate in the form of bread).
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The amount, timing, and kind of carbohydrate consumed can determine the physical performance of an athlete. Although specific sports have different energy needs, carbohydrate is the most important source of energy to support the demand of all physical activity.
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