What is the primary fuel source for exercise at a high intensity (i.e. about 70% of...

What is the primary fuel source for exercise at a high intensity (i.e. about 70% of max)?

	a.	Proteins
	b.	Proteins and fats
	c.	Carbohydrates
	d.	Fats

Expert Solution

What is the primary fuel source for exercise at high intensity (i.e. about 70% of max)?

Answer: c) Carbohydrates.

Explanation:

- During high intensity exercises, body mainly use carbohydrates as the primary fuel source of energy. The energy is produced in the form of ATP molecules. Glycogen is the main carbohydrate used during high intensity exercises.

- Glycogen is stored in the skeletal muscles and liver. Initially, glycogen stored in the skeletal muscles is used and once it is depleted, liver glycogen stores are used. Glycogen is broken down to glucose in the blood and utilized to produce ATP (adenosine triphosphate) molecules as energy. The process of glycogen breakdown is known as glycogenolysis.

- During low intensity exercises, fats and blood glucose are used as source of fuel for energy production. Fats which are stored in the adipose tissue in the form of triglycerides are broken down to free fatty acids and glycerol. This free fatty acids released in the blood is used as source of fuel for energy production.

Sydney Mullin answered 1 year ago

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