We generally consider your 2% as 30 minutes of “physical activity.” Everyone is at a different baseline of health so 2% will be different for different individuals. Ideally, physical activity throughout the week will include aerobic and strength building activities. Aerobic exercise can include activities such as brisk walking, bicycling, and mowing the lawn. Strength training can include activities like rock climbing, heavy gardening, or moving furniture. The important part is to aim to get at least 30 minutes of physical activity a day.
http://www.mayoclinic.com/health/exercise/AN01713
http://www.mayoclinic.com/health/exercise-intensity/SM00113