ENERGY

     A.Energy balance equation
          ener. in = ener out = weight the same

     B.   factors
               a.genetic Link
                    *    proven in animals, not in humans
                    (1)obese + obese = 73 % chance child obese
                    (2)   "   normal = 40 -50 % chance
                    (3)normal +  "   =  9 % chance
               b.Nutritional factors
                    (1)  total # of calories
                    (2)  composition of diet
                    (3)  palatability of diet
                    (4)  meal size and frequency
                    (5)  time of day meal eaten
               c.Exercise
                    (1)  relat. between sedentary job and obesity
                    (2)  obese are less active
                              * but, which came first
                    (3)  TV watchers 
                         (a)increased risk 2 % an hour
                         (b) obesity def. at triceps at 85%ile
                         (c)TV viewing increases munchies
                     *Ways to help kids
                         1. reduce tv viewing
                         2.    "   munching while eating
                         3.    "   food advertisements on TV
               d.Endocrine system
                    (1)imbalances can affect weight
                    (2)Hypothalamus
appestat                      i)feeding center  -lateral
centers                       ii)satiety center  -ventral medial
               e.Stress
                    (1)Affects people differently
                              i)over vs. under eaters
               f.pregnancy
                    (1)increases in body fat
                         (a)lost if nursing occurs,stays if don't
                    (2)weight gains are 12 - 14 kg.
                         (a)2 - 4 kg. fat
                         (b)2 - 4 kg. placenta
                         (c) half volume = fluids
               g.Society and socio-economic factors