Craig Hassed; Week 8 MED1011; HEP
Inactivity linked to metabolic disease, major contribution to disease burden. Associated with NIDDM (90%), hypertension, cancer, CHD in non-smokers. Basal metabolic rate increases 1-2 hours after exercising, involved in weight control and maintenance and important in treating metabolic syndrome. Energy expenditure is 70% BMR, 20% exercise 10% food.
Percieved barriers to exercise are lack of time, lack of motivation. Exercise needs to be enjoyable. Barriers can be finance, physical injuries, convenience. Exercise is associated with enhanced memory, sedentary people have averse psychological symptoms. Exercise improves lipid profile, insulin resistance and endothelial function. Decreases thrombogenesis, decreases hospitalisation, blood pressure and inflammation. Moderate physical activity causes 50% decrease in risk of a heart attack. Exercise helps in respiratory conditions. Before infection is protective, during it can be a problem. Increases quality of life in cancer, increases survival and decreases risk of cancer. Helps with musculoskeletal problems. Decreases chronic pain, increases coping. Exercise is also linked to sedentary behaviour and adolescent health risk behaviour.
Non structured physical activity is incidental and active, such as getting off the bus a few stops early or late. MET is resting metabolic rate - 3.5ml O2/kg/minute. 200ml O2 to burn 1kcal. Exercise is underused as a prescription.