Longitudinal Comparison of Aerobic Power and Heart Rate Responses at Submaximal and Maximal Workloads in Active and Inactive Boys Aged 8 to 16 Years
The effect of physical activity or inactivity on the growth and development of children is a research topic of general interest to educators and health professionals. Despite the conclusion by a number of review articles (Espenschade, 1960, Rarick, 1975; Bailey et al., 1978; Malina, 1980) that a certain amount of physical activity is necessary to promote normal growth, neither the amount, intensity or frequency has been specified by the review articles or subsequent investigations. The effect of physical activity in adults is well documented. Few studies have examined this question in children particularly with a long term longitudinal research design (Andersen et al., 1976; Sprynarova, 1974; Kobayashi et al., 1978; Mirwald et al., 1981). Complicating the interpretation of the results of such investigations is the inability to assess changes due to normal expected growth, variation in maturational tempo, genetic contribution, or the physical activity. Additional evidence has been gained from short term training studies, but dissimilar and unquantified training demands and limited age ranges further confounds the interpretation of the results (Ekblom, 1969; Eriksson, 1972; Stewart and Gutin, 1976; Daniels and Oldridge, 1971; Rnuttgen, 1967; Lussier and Buskirk, 1977).
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