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Abstract The purpose of the present study is to investigate the association of different physical activity levels on the physiological indicators of middle-aged men. The International Physical Activity Questionnaire (IPAQ) was administered to classify 177 middle-aged men (aged 40–59 years) from urban areas of Shandong, China into three groups: 45 with high physical activity, 57 with moderate physical activity, and 75 with low physical activity.
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