logging in or signing up Energy Balance Megang Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 890 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: October 29, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Energy Balance : Energy Balance Getting the Equation to Work The Hard Question : The Hard Question How much should I eat each day? What you are doing Positive/negative or equal energy balance Need to calculate BMR Each Person is an Individual : Nutrition Applied PT571001; SP572001; SM569001 Each Person is an Individual Largest energy requirements for those who are: Young Growing Large Muscular Have long high intensity training sessions Energy Balance : Energy Balance Total Daily Energy Intake: (TDEI) refers to the energy obtained from the diet in a day period Total Daily Energy Expenditure: (TDEE) refers to all the energy used to power the body through a day period Energy Balance when: TDEI = TDEE → amount of energy put into body equals amount of energy spent over the day. Energy Balance and Body Weight : Energy Balance and Body Weight If TDEI = TDEE body weight (BW) remains stable If TDEI > TDEE POSITIVE energy balance body stores extra energy ( BW) If TDEI < TDEE NEGATIVE energy balance body uses stored energy to make up difference ( BW) Changing energy balance affects body weight How Do We Measure Energy Expenditure? : How Do We Measure Energy Expenditure? Indirect Calorimetry Hard to do in the field Measures RER by O2/CO2 ratios Reliant on knowing diet and exercise Doubly-labelled Water Accurate but very expensive Prediction Equations Food Energy : Food Energy The macronutrients in food provide energy to power body functions. Food energy measured in kilojoules (kJ) or kilocalories (kcal or Cal): 1Cal = 4.2kJ What you eat is important because: Different energy kJ/g of each nutrient: CHO = 16kJ/g Protein = 17kJ/g Fat = 37kJ/g Alcohol = 29kJ/g Nutrients used differently in the body Food Energy : Food Energy Alcoholin = Alcoholoxidation Carbohydratein = Carbohydrateoxidation Fatin = Fatoxidation Proteinin = Proteinoxidation When any of the nutrients in are greater than the oxidation then have food energy stored. Total Daily Energy Expenditure : Total Daily Energy Expenditure How do we change our TDEE? BMR Physical Activity Thermic Effect of Food What is TDEE : What is TDEE The energy used to power the body through 24 hours TDEE is made up to 3 parts: Basal Metabolic Rate (BMR) Energy required for basic body functions 50-60% TDEE Physical Activity Includes energy cost of purposeful activities of daily living and/or planned exercise 20-40% TDEE Thermic Effect of Food (TEF) Energy required to process food in the body <10% TDEE Basal Metabolic Rate : Basal Metabolic Rate Basal metabolic rate influenced by: Body Size: BMR with body mass Body Composition: adipose (fat) tissue has lower energy demand than muscle → BMR with muscle; with fat. Age: BMR with age Gender: BMR women cf men ( total mass, women higher fat to muscle ratio) Genetic component Nutritional status: adaptive changes to modified energy intake Physical Activity : Physical Activity Most variable component of energy expenditure. Physical activity energy demand influenced by: Type ( with weight bearing/loading) Intensity ( with intensity) Duration ( with duration) Size of Individual ( with size) Rest between movements ( with rest) Skill of movement (muscle efficiency) ( with skill) Factors Affecting TEF : Factors Affecting TEF Genetically determined?? Diet composition: TEF in response to protein cf fat and CHO Very small contributor to total daily energy expenditure You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.