 Kilocalories from food → fuel all of your body’s activities.  While asleep → body releases energy from nutrients in your diet to maintain its basic functions.

 Heat energy supplied by kilocalories come from a number of sources.  Each source has a specific effect on your health.  How can a person have enough to eat → still not have enough energy?

 Weight control – relationship between energy intake and weight.  Extra weight (extra fat) increases the workload of the heart lungs joints

 Extra weight raises the risk for – High blood pressure Heart disease Diabetes  Extreme overweight – Obesity, excess fat and a body weight that is 20% or more above a healthful range.

 Energy supply comes from kilocalories of non-nutritious food sources (do not provide the needed nutrients) ↓ listless and lack energy prone to infection concentration can be affected

The Energy Balance maintaining a helpful weight →like balancing a budget Intake should equal output Consume roughly the same number of kilocalories as you use in your daily activities More active – move kilocalories you need

 Every 3500 kilocalories of energy income your body doesn’t need is →stored as about 500 grams, half a kilogram, of body fat (about one pound)  To lose half a kilogram of excess body fat, eat 3500 kilocalories less than your body needs

Too lose weight slowly  Eating 500 kilocalories less per day  Results in half-kilogram loss of body fat in a week  Decrease kilocalorie consumption → increase physical activity → lose weight slowly  If you want to loose 1 pound, how many days would it take you by eating 500 kcalories less per day.  3500 = 1 pound 3500 ÷ 500 = 7 Would take you 7 days

To gain a half-kilogram a week  Eat 500 kilocalories a day over your body’s needs Eating a diet of saltine crackers vs. gaining weight with diet of ice cream Which is better?

Tim wants to lose weight. He decides to give up his daily English muffin, which supplies 650 kcalories. Consuming less than the 3500 kcalories than the body needs will result in a weight loss of one pound. How many days will it take Tim to lose this amount of weight? (1 pound)