Heart rate-is it safe? confused?

Generally speaking, all adults should have a resting pulse rate of between 60 and 90 beats per minute. I learned years ago in gym class that 180 beats (while exercising of course!) should not be exceeded to prevent damage to/strain on the heart. That's awesome that you're in great shape! However, it does sound to me like the excess fat on your body is holding you back from your potential and putting strain on your body. I believe that if you can lose some weight, your heart rate will decrease to a healthy level and you will become that much more in shape and healthier. :)