The Candle Burning Guide - Center Burning Candles. Certain candles are designed to burn down the middle for different reasons, or a combination of different reasons. Candles with a unique finish, or unique burning characteristic, may burn down the middle in order to position the flame inside of the candle and illuminate from the inside out.
To find your maximum heart rate, subtract your age from 220. For example, if you are 40 years old, your maximum heart rate is 180 (that is, 220 - 40 = 180). Multiplying this by 50 percent and then 85 percent results in your target heart rate range of 90 to 153 beats per minute.
Heart rates that are too low or too high may cause health problems. Consult with your doctor if your resting heart rate drops below 60 or rises above 100 for a consistent period of time. Doctors call lower-than-normal heart rates bradycardia, and higher-than-usual heart rates tachycardia. The normal heart rate for adults generally ranges from 60 to 100 beats per minute. This means your heart normally beats one to two times per second. Calculate your resting heart rate by placing your index and middle fingers on your neck to the side of your windpipe.