When you exercise, it is important to work at an intensity level that is right for you. This is defined as your Target Heart Rate, which is what your pulse rate should be to exercise safely and receive the maximum cardiovascular benefits. The key is to maintain this rate for 30 minutes at least 3 times a week.

The easiest way to check your heart rate is to place the tips of your middle and index fingers in the groove of your throat just to the side of the Adam's apple. Count the heart beats for six seconds and multiply the number of beats by 10. If you are not within your range, you may need to adjust your workout. After cooling down, check your pulse rate again. It should be below 100 before you stop moving.

Remember, your target heart rate is only a guide so listen to your body for signs of injury or overexertion. If you are over 35 or have medical problems, check with your doctor before beginning an exercise program.

For more information log on to www.med.umich.edu