62• Shortness of breath with mild exertion or atrest, or when lying down or going to bed.• Ankle swelling, especially at night• A heart murmur or a rapid or pronouncedheartbeat• Muscle pain when walking upstairs or up a hillthat goes away when you restThe American College of Sports Medicinerecommends that you see your doctor beforeengaging in vigorous exercise if two or more ofthe following apply:• You are a man older than age 45 or a womanolder than age 55.• You have a family history of heart diseasebefore age 55.• You smoke or quit smoking in the past sixmonths.• You have not exercise for three months ormore.• You are overweight or obese.• You have high blood pressure or highcholesterol.• You have impaired glucose tolerance, also callpre-diabetes.When in Doubt - Check it OutIf you are unsure of your health status, haveseveral health problems, or are pregnant, youshould speak with your doctor before starting anew exercise program. Working with your doctorahead of time is a good way to plan an exerciseprogram that is right and safe for you. Consider itthe first step on your path to physical fitness.Note:• The accuracy of the heart rate sensor maybe diminished depending on measurementconditions and surroundings.• Use the HR feature only for measuring yourheart rate.