One of the most surprising things about the black colored pair of eyes is that true black eyes are very rare. What we see and call as black eyes are in actuality just very dark brown eyes. The dark brown or black, as we may call it for own usage is often associated with night, mystery and intuition.
There are different ways to calculate your target heart rate zone, but the Karvonen Method is one of the most effective because it factors in your resting heart rate. Here's how to calculate your target heart rate zone using the Karvonen Method: 1. Measure your resting heart rate when you first wake up. You can do this by taking your pulse for one minute while still in bed. To take your pulse, place two fingertips (not a thumb) on either the radial (on your wrist, at the base of your thumb) or carotid (neck, next to your larynx) pulse site.
Try measuring your radial pulse, which is on your wrist artery, just below your thumb. To measure your heart rate, gently press the tips of your index and middle fingers over the blood vessels on your wrist. Make sure not to use your thumb, because it has its own pulse. Count the beats you feel for a full minute. You can also count for 30 seconds and multiply the count by two, or count for 10 seconds and multiply by six. Alternatively, you can use a heart rate monitor, which determines your heart rate automatically.