BASAL METABOLIC RATE

     A.   The rate at which the body uses energy while at rest
          1.   usually measured in the morn.
     B.   Criteria for measurement
          1.   No food in the past 12 hours
               a.   because of the specific dynamic action of food
                    (SDA)
                    (1)  also known as:
                         (a)  dietary induced thermogenesis (DIT)
                         (b)  thermic effect of food (TEF)
               b.   need to be in the post absorbtive state
          2.   Need 8 hours of restful sleep
               a.   this slows the sympathetic nervous system to
                    its lowest levels
          3.   No strenuous exercise after sleeping
          4.   Just prior to the test, remain still for 30 minutes
          5.   Be in a restful state of mind
          6.   Comfortable room temperature (68 - 85 deg. F.)
               a.   less than 68, body produces heat
               b.   over 80 the sweating reflex starts, incr.
                    temp.
     C.   Can vary anywhere from 0 to 30 %

I.   RESTING METABOLIC RATE

     A.   Involves BMR and light activity
     B.   Can be absorbing food, also

          * In the Williams Text
               a.   for a sedentary person
                    (1)  BMR = 73%
                    (2)  TEF = 15 %
                    (3)  Exer = 12 %

II.  Methods of estimating BMR and RMR

     A.   BMR
          1.   Estimate from body surface area
               a.   males are more than females
               b.   can come within 10%
          2.   Estimate from body weight
     B.   RMR
          1.   Benedict Equation
               a.   Height * weight * age, etc.
               b.   comes w/in 14% of RMR

III. Precise measures of BMR
          1.   expressed in kcal / hr, or kcal / day
     A.   get into BMR state
     B.   measure O2 content for 10 min.
     C.   measure RQ to get the fuels burned