To the Editor.— Twenty years ago, we examined the minimum muscular fitness of children here and abroad (Switzerland, Italy, Austria). The key posture muscles of our children proved considerably weaker and less flexible than their counterparts abroad, proving that our children are too sedentary. These findings were submitted to President Eisenhower at a White House luncheon conference and prompted him to establish the President's Council on Physical Fitness, then called Youth Fitness. Unfortunately, except for isolated programs, no national or even state efforts have been made except in the field of public relations. At this time, when the need for preventive medical care is of special interest, preventive programs should be started at once. We agree with Cooper that the time to keep the cardiovascular system in good working condition is before it starts to disintegrate, and would add exercise programs and training of exercise habits not at 18 years