XSIQ
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Physical Education - The conversion of food to energy: carbohydrates
Carbohydrates
Carbohydrates [1] are the primary fuel source for aerobic and anaerobic
events. They are also important for the restoration of PC system, which
relies on the aerobic system.
During high intensity aerobic efforts, carbohydrates [2] are the major
energy source. When performing moderate intensity aerobic efforts,
carbohydrates are still the major source; however, increasing amounts of
fat are used as the intensity is decreased.
Carbohydrates are the preferred source of energy over fats, as
carbohydrates require less oxygen to produce the same amount of energy.
Hence, when intensity increases and more energy is required, the body burns
higher percentages of carbohydrates.
Energy expenditure after exercise is also significant, as fat is the
predominant supplier of energy. This point is important when weight loss is
an issue.
Remember that if you are going to do a long endurance event, you need to
increase carbohydrate stores to 70-80% of your total energy intake. This
means a decrease in fat intake. Protein should be kept the same.
There is only a certain amount of carbohydrate that the body is able to
store (approximately 1 hour's worth)
* events lasting 1 hour only require normal carbohydrate stores
* events lasting 1.5 hrs that are continuous or high intensity (but
intermittent in nature) require well-filled glycogen stores (this may
require some kind of carbohydrate loading)
* events that are 2+ hours in duration require super-filled glycogen
stores (definitely require carbo loading)
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[2] http://alison.com/#
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During high intensity aerobic efforts, carbohydrates are the major energy source. When performing moderate intensity aerobic efforts, carbohydrates are still the major source; however, increasing amounts of fat are used as the intensity is decreased. Carbohydrates are the preferred source of energy over fats, as carbohydrates require less oxygen to produce the same amount of energy. Hence, when intensity increases and more energy is required, the body burns higher percentages of carbohydrates. Note: Energy expenditure after exercise is also significant, as fat is the predominant supplier of energy. This point is important when weight loss is an issue.
How do carbohydrates convert from food to energy?H
Carbohydrates:- During high intensity aerobic efforts, carbohydrates are the major energy source. When performing moderate intensity aerobic efforts, carbohydrates are still the major source; however, increasing amounts of fat are used as the intensity is decreased. Carbohydrates are the preferred source of energy over fats, as carbohydrates require less oxygen to produce the same amount of energy. Hence, when intensity increases and more energy is required, the body burns higher percentages of carbohydrates. Note: Energy expenditure after exercise is also significant, as fat is the predominant supplier of energy. This point is important when weight loss is an issue.
How is the role of carbohydrates in energy.