PSE4U – Exercise Science Monday, March 1, 2010

Lesson by nutrition experts Miss L. Corrente & Miss A. Read Presented to the Grade 12 Exercise Science Class

 Nutrition unit test  Friday, March 12, 2010  One –week Food Diary Assignment  Friday, March 12, 2010  Create a 2-3 minute podcast or video about one concept below:  Obesity epidemic  “Healthy Schools” Initiative & cafeteria food  Diet for optimal athletic performance

 Digestive system  Macronutrients  Proteins, fats, & carbohydrates  Micronutrients  Minerals, vitamins, fibre & water  Canada’s Food Guide & Nutrition Labels  Energy In & Energy Out  Body Mass Index  Obesity

ENERGY IN – ENERGY OUT

 Calorie  Amount of heat needed to raise the temperature of 1 gram of pure water by 1C  1000 Calories – 1 kilocalorie (kcal)  Foods high in Calories can produce lots of energy

CHANGE in ENERGY STORES = ENERGY IN – ENERGY OUT  Amount of excess energy stored by our body represents the difference between the amount taken in and the amount expended  Consume more than expend = weight gain  Expend more than consume = weight loss

 Energy in foods and beverages is the only contributor to the “energy in” side of the energy balance equation  Need to become familiar with the amounts of energy in foods and beverages  Recommendations for energy intake vary from individual to individual

 No easy method exists for determining the energy an individual spends and therefore needs  One way to estimate energy needs is to monitor your food intake and body weight over a period of time (activities during this time are typical)

 On your computer, please visit and navigate the following wiki page, paying special attention to the “Food Diary Assignment” page, which has an assignment for you to complete before the end of class! 

What have you learned from this activity?

 When you have completed your food diary, conduct an Internet search to find the definitions for the following 10 key terms (please reference your answers) NutritionEssential Nutrients NutrientsEnergy-yielding nutrients AdequacyInorganic BalanceOrganic ModerationVariety

 Tomorrow: Digestion  Read pages of Klavora text  Answer the following questions:  What is digestion?  What organs make up the digestive system?  What enzymes are used in the digestive process?