Development of the Energetics of Muscular Exercise with Age: Summary of A 30-year Study≔ II. “Power Zones” and Their Changes with Age

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An ergometric model of relative power zones of cyclic muscular exercise is presented. Age-related changes in the main ergometric parameters, as well as the structure of the entire range of muscle loads bearable by humans, have been studied in 7-to 17-year-old boys. The ergometric parameters reflecting the power characteristics of muscles increase by a factor of about two in the age interval studied, while the parameters characterizing the capacity of the energy system of skeletal muscle increase by a factor of several tens. This reflects the actual increase in muscle working capacity during the maturation of the musculoskeletal system.

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