Compare the (A.) relative availability and (B.) use of carbohydrate, fat, and pr
ID: 3510058 • Letter: C
Question
Compare the (A.) relative availability and (B.) use of carbohydrate, fat, and protein fuel substrates on the basis of intensity and duration of exercise and rest. (Rest, low intensity long duration-high intensity short duration, static & high intensity dynamic exercise) Compare the (A.) relative availability and (B.) use of carbohydrate, fat, and protein fuel substrates on the basis of intensity and duration of exercise and rest. (Rest, low intensity long duration-high intensity short duration, static & high intensity dynamic exercise)Explanation / Answer
A. Relative availability of carbohydrates, fat and protein fuel substrates during rest:
Carbohydrates contributes about 33% to the total body energy requirements during rest. The substrate for carbohydrate is glycogen which as a repository.
Fata contribute to roughly 66% of the energy requirements. Hence, it can be inferred that the relative availblility of fats during rest is the maximum.
So, we can conclude that proteins contribute to roughly 1% of the energy requirements during rest.
B. Use of carbohydrates, fats and protein fuel substrates on the absis of intensity and duration of exercise:
Maximum Usage; higher proportion of fat is expended.
60% contributor of energy at 20% of VO2 Max.
Rate of fat metabolism is 33% higher when at 50% VO2 Max.
Maximum usage; maximum expenditure of calories. Recruitment of type II muscle fibres utilises glycogen and results in more production of lactate,
Kinds of Exercises Carbohydrates Fats Proteins Low intensity long durationMaximum Usage; higher proportion of fat is expended.
60% contributor of energy at 20% of VO2 Max.
Rate of fat metabolism is 33% higher when at 50% VO2 Max.
High Intensity short durationMaximum usage; maximum expenditure of calories. Recruitment of type II muscle fibres utilises glycogen and results in more production of lactate,
More lactate production inhibits metabolism of fats. Static & high intensity dynamic Primary utilisation of carbohydrates; with usage in ATP and lactic acid energy system.Lactic acid acts as a fuel substrate. Used after ATP and creatinine phosphate levels runs out.Related Questions
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