Cardio
How much physical activity do adults need?
Physical activity is anything that gets your body moving. According to the 2008 Physical Activity Guidelines for Americans, you need to do two types of physical activity each week to improve your healthâaerobic and muscle-strengthening.
''Moderate-intensity aerobic activity means you're working hard enough to raise your heart rate and break a sweat.''
http://www.cdc.gov/physicalactivity/everyone/guidelines/adults.html