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Physical efficiency tests were performed on urban school boys drawn from higher socio-economic status in comparison to rural school boys. The height and weight records of the subjects indicating growth process showed that the rural boys attained less physical growth than their urban counterparts. The Vital Capacity and Peak Expiratory Flow Rate data expressed either per unit of height or body surface area were significantly lower in rural boys. These findings indicated a poor development of the thorax in the rural group. However, the determined grip strengths for both the groups were similar. The grip test might reflect improvement of muscle mass in case of rural boys as a result of regular physical activity employing the arm muscles.

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