For adults aged 18 to 65 years and without disability or a chronic medical condition the specific guidelines are to perform each week: 150 minutes of moderate-intensity aerobic activity OR 75 minutes of vigorous-intensity aerobic activity OR an equivalent combination AND   Muscle-strengthening activities involving all major muscle groups on 2 or more days According to the Center for Disease Control and Prevention (CDC), less than half (48%) of all adults meet the 2008 Physical Activity Guidelines of: In addition, the guidelines specify that: Aerobic activity should be performed in bouts of ...

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