Nov. 13, 2000 - Legs striding, arms pumping, I'm hustling down a long corridor at the Cooper Institute of Aerobics Research in Dallas, alongside exercise scientist Andrea Dunn, PhD.

Dr. Steven N. Blair of the Cooper Institute for Aerobics Research in Dallas said: "Our data support the belief that moderately intense activity does have mortality benefits.

Dr. Steven N. Blair, an epidemiologist with the Cooper Institute for Aerobics Research in Dallas, disagrees.

A study of more than 10,000 men and 3,000 women examined at the Institute for Aerobics Research in Dallas found that those who were most fit on a treadmill test had much lower cancer death rates in the ensuing eight years.

Exercise helps people lose weight, though a surprising study by researchers at the Cooper Institute for Aerobics Research in Dallas found it is better for your heart for you to be fit than thin.

"The message is less is enough," says Dr. Joe Coetzee, a physician at the Cooper Institute for Aerobics Research, a nonprofit group in Dallas.

Baby boomers, said Dr. Kenneth Cooper, director of the Cooper Institute for Aerobics Research in Dallas, "are beginning to lose interest" in exercise.

Dr. John Duncan, an exercise physiologist who is associate director of the Cooper Institute for Aerobics Research in Dallas, agreed with this approach.

It was 2 in the afternoon, lunchtime at the 30-acre Cooper Aerobics Center in Dallas, which includes a clinic, a health club, a hotel and the Cooper Institute for Aerobics Research.

In 1989, the Cooper Institute for Aerobics Research released its own study that showed that people could be healthy without being aerobically fit.