How to tell if you're in the zone

So how do you know if you're in your target heart rate zone? Use these steps to check your heart rate during exercise:

• Stop momentarily.
• Take your pulse for 15 seconds. To check your pulse over your carotid artery, place your index and third fingers on your neck to the side of your windpipe. To check your pulse at your wrist, place two fingers between the bone and the tendon over your radial artery — which is located on the thumb side of your wrist.
• Multiply this number by 4 to calculate your beats per minute.

Here's an example: You stop exercising and take your pulse for 15 seconds, getting 37 beats. Multiply 37 by 4, to get 148. If you're 45 years old, this puts you in your target heart rate zone for vigorous exercise, since that zone is between 146.5 and 160.75 beats per minute. If you're under or over your target heart rate zone, adjust your exercise intensity.