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Cardiorespiratory fitness in youth: An important marker of health

from Circulation

Cardiorespiratory fitness in youth: An important marker of health Circulation Cardiorespiratory fitness (CRF) refers to the capacity of the circulatory and respiratory systems to supply oxygen to skeletal muscle mitochondria for energy production needed during physical activity. CRF is an important marker of physical and mental health and academic achievement in youth. However, only 40% of US youth are currently believed to have healthy CRF. READ MORE

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