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.
Maxing Out. The intensity of cardiovascular exercise is often based on percentage of maximum heart rate. To calculate your maximum heart rate subtract your age from 220. For example, the maximum heart rate for a 40 year old would be 180 beats per minute (220 - 40 = 180). Some factors such as medications you're taking and coronary conditions can affect maximum heart rate and you should talk to your doctor about your exercise program.