Geezer is a bit foggy about his anaerobic threshold, the point when the body stops using fat and oxygen for fuel and relies, instead, on carbohydrates, but if he did want to locate it, he could find a test to do that. Similarly, if he wanted to identify his resting metabolic rate, or the number of calories are burned per day at rest, he could do that. Many people are, as Jeannine Stein points out in her LA times story about the arrival of high tech fitness tests and many health clubs. The big question, of course, is whether knowing any of these numbers actually helps a person stay fit. On that, Stein reports, the experts are mixed. Read more on high tech fitness tests in the LA Times.