1. Metabolism

2. Definitions… Metabolism – the sum of all the chemical processes whereby _______ is made available and used by the cells of the body Energy – the ability to do work

3. Two Types of Metabolism Catabolic MetabolismAnabolic Metabolism

4. Energy is used for…

5. Energy Balance Equation Resting Metabolic Rate (55-75%) + Thermal Effect of Food (5-15%) + Physical Activity (10-40%) = Total Energy Expenditure (100%)

6. Energy (cal.) & Body Weight 1 st Law of Thermodynamics Weight gain Weight loss Weight maintenance

7. Resting Metabolic Rate The number of calories the body burns in a 24-hour period while at rest and fasting. Liver___% of total calories burned Brain___% Heart___% Lungs___% Kidneys___% ___________% At rest approx. ____% of energy is derived from stored body fat

8. Resting Metabolic Rate & Gender Resting metabolic rate (energy expenditure) is approximately 10% lower in women than men RMR is essentially the same when expressed per unit of “fat-free mass” Therefore, not a true gender difference

9. Effects of Strength Training on Resting Metabolic Rate 24 weeks strength training = increase RMR 6% - 9% Each additional pound of muscle tissue = ____ kcal/day increase in metabolism

10. Effects of Severe Caloric Restriction (Dieting) on RMR _____% decline in RMR with severe caloric restriction - Result of: 1. ___________________ 2. ___________________

11. Set Point “Theory” & Adaptive Thermogenesis Hypothalamus establishes a “set point” or body weight that it will work to maintain Adaptive Thermogenesis – the body will speed up or slow down metabolism to maintain the set point If consume fewer calories… If consume more calories… To reset the set point

12. Thermal Effect of Food Calories burned to digest, absorb, and transport the nutrients in food we consumed. Protein: 15-25% (of food calories) Carbohydrate: 8-12% Fat: 5%

13. Physical Activity (thermal effect) Calories burned to support physical activity Activities of daily living - ________ Factor Planned exercise - Intensity and duration

14. Post Exercise Thermogenesis The increased metabolic rate (calories burned) above resting metabolism (Resting Metabolic Rate) that follows cessation of exercise. approx. 15% of total exercise caloric burn