Your chart "Maximum Mile Time Required To Meet Healthy Fitness Zone" would predict that the olympic mile runners would all be short, and very heavy people, sence having the same VO2 consumption they can run a mile as fast as 2:03 for a 16 year old male who is 4'4", and 240 lbs. It is obvious that the eargonomic model used to develop your formulas did not take into account the greater energy expenditure necessary to carry the 240# person in an actual weight bearing activity such as running a mile. If you ever could find a 240# person who could run a mile at 30 miles per hr. You would also have a person with a V02 consumption of more like 150 rather than 44. When you use an inapropriate ergonomic modle thoes are the kind of results you will get. Your modle suggests that a basethound should easly run a mile about 6 times faster than a grayhound in perfect shape. You woule do the kids of California a great service if you would come up with some appropriate numbers that our kids can use as fitness goals. These kinds of numbers do nothing to challange our kids at either end of the BMI spectrom. Dwight Shirley PE SanPasqual High School Escondido Calif.