Asteroid Belt. About 2-4 AU (186-370 million miles) away from the Sun, between the orbits of Mars and Jupiter, is a region called the Asteroid Belt. This region is a ring of tens of thousands of relatively small rocky objects called Asteroids. Asteroids can vary greatly in size.
A normal pulse rate for a healthy adult, while resting, can range from 60 to 100 beats per minute, depending on athletic ability. [ Source: http://www.chacha.com/question/what-is-your-pulse-supposed-to-be ].
Resting heart rate, or pulse, refers to the number of times your heart beats per minute when you are at rest. Though a normal range is 50 to 100, most peopleâs hearts beat 60 to 80 times a minute. Above 100 is considered a rapid pulse, called tachycardia; an unusually slow resting heart rate is called bradycardia.or example, if you are 50, your maximum heart rate is 220 minus 50, or 170. Then multiply 170 by 0.6 (for the low end) and by 0.8 (for the high end), which gives a range of 102 to 136. Your heart rate should fall between these two numbers while you exercise.