Harris-Benedict Equation* for Caloric Intake Requirements**

Males: (Calories/Day)
Resting Energy Expenditure =   (66.47 + 6.237 x Weight (lbs.) + 12.7 x Height (inches.) - 6.775 x Age) x Activity Factor

where Activity Factor = 1.0 for Bedrest
= 1.2 for Ambulatory/Sedentary
= 1.375 for Light Exercise/Sports 1-3 Days/Week
= 1.55 for Moderate Exercise/Sports 3-5 Days/Week
= 1.725 for Hard Exercise/Sports 5-7 Days/Week
= 1.9 for Very Hard Daily Exercise/Sports

Females: (Calories/Day)
Resting Energy Expenditure =   (655.1 + 9.56 Weight + 1.85 Height - 4.68 Age) X Activity Factor

My Numbers
My weight:  128 lbs. = 58.2 kg.
My height:       5' 7" = 170 cms.
My Activity Factor = 1.375?
My Age                  =  75
My Calorie Needs=  2,000?

For someone (not me!) at 320 lbs.    2,892 kCal./day
For someone (not me!) at 256 lbs.    2,412 kCal./day
For me at 160 lbs.    1,692 kCal./day
For me at 144 lbs.    1,572 kCal./day
For me at 128 lbs.:   1,452 kCal./day
For me at 124 lbs.:   1,422 kCal./day
For someone (not me!) at 80 lbs.    1,092 kCal./day

My calorie requirements at a 10% weight reduction are 92.8% what they are at full weight... i. e., 7.1% less
My calorie requirements at a 20% weight reduction are 85.6% what they are at full weight... i. e., 14.2% less.
My calorie requirements at a 25% weight reduction are 82.1% what they are at full weight... i. e., 17.9% less.
My calorie requirements at a 50% weight reduction would be 65.4% what they are at full weight... i. e., 33.9% less.
My calorie requirements at 200% of 160 lbs. (320 lbs.) would be 1.66 times what they would be at baseline weight (160 lbs.)..

Blood Pressure vs. Weight:  Drops 1 mm. Hg.  (both systolic and diastolic) per kg. lost
Blood Pressure and Exercise:  (4 mm. Hg. systolic, 3 mm. diastolic) (meta-analysis of 54 trials involving 2,419 adults.
Aerobic exercise lowers B. P. by 11 mm. systolic and 9 mm. diastolic

*     - Weight Loss Formula
**   - Cornell University PediatricCritical Care Medicine
*** - University of Connecticut Health Center