An article discusses what is known about children's fitness based on numerous small-scale studies. Specifically addressed are issues of cardiovascular fitness, effects of training, participation in physical activity, and behavioral carryovers to adulthood. Six articles follow that comment on and critique the first. (Author/MT)

Although research indicates that the growth and development of young athletes is not adversely affected by continuous rigorous physical activity, there is evidence to support the fact that inclusion of certain nutritional programs may deplete the physically active child. Cardiovascular involvement should be monitored and proper safeguards taken to…

Oxygen uptake and heart rate kinetics for submaximum exercise (bicycle riding) were compared in prepubescent boys and adult men. Resulting data suggest that children and adults do not differ significantly in cardiorespiratory adjustments during low-intensity exercise. (Authors/PP)

The oxygen uptake and heart rate of men and boys were determined and compared using a continuous incremental bicycle ergometer test. Both groups had similar patterns for consistency, but the children had smaller individual difference variations for both oxygen uptake and heart rate. (FG)

A series of questions and answers helps teachers and leaders understand how much physical activity is enough for children and adolescents, discussing the guidelines used to make recommendations; childrens' and adolescents' unique physical activity needs; lifetime activity needs; and aerobic versus strength, endurance, and flexibility training. (SM)