In: Biology
Cholesterol is a waxy type of lipid (or fat substance) found in our blood circulation, by the intake of foods like meat, poultry and egg yolks. It is carried in the blood circulation by two types of proteins they are low density lipo proteins or LDL and High density lipo proteins or HDL . HDL is a good cholesterol, when cholestrol level increases in body, The LDL starts getting sticked to the inner wall of arteries and making plaques and narrowing the arteries leading to cardio vascular diseases.
When the level of cholesterol increases in blood, exercise plays an important role in reducing the level, It increases the HDL and reduces the LDL. Exercise stimulates the enzymes that helps to move LDL from blood to liver, in liver LDL is converted to bile (for digestion) or is excreted out from body. HDL also helps in transporting excess cholesterol from the cells to the liver, here it is processed and eliminated out of the body. Exercise also reduces another fatty substance in blood called triglyceride.
Exercises increases the size of the protein particles carrying cholesterol in blood, combination of protein particles and cholesterole called lipoproteins, these particles are small and dense and some are big and fluffy , small ones can enter into the lining of heart and blood vessels and can cause damage. But exercise increases the size of the protein particles carrying both good and bad lipoproteins, and do not allow them to enter the blood vessels.
Moderate exercise reduces LDL by 10% , it is also seen that endurance exercises like (walking, swimming, running etc.) slightly reduce absorption of cholesterol from small intestine to blood circulation.
Exercise reduces the weight of a person, indirectly reducing LDL because weight increases the LDL level in a person. Exercise also reduces blood pressure and lessens the risk of heart attack.
In this way a person can lower there cholesterol level by doing exercise.