Attached is a better pic of the DVD case covers that I talked about yesterday.
What should your heart rate be while exercising? The answer is that once warmed up you should be in a certain range. Take 220 and subract your age. We can use a 40 year old as an example. That would be 180. This is called "maximum heart rate." You should not go over this while exercising. Now take 2/3 of 180 and you have about 118. After warming up you should be above this figure but never higher than your max heart rate figure. This is the normal heart rate range while exercising. By staying in this range, you imporve heart and lung function and burn fat and calories.
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