Pulse Rate

After you’ve logged in your daily jog around the block (see “Logging Your Jogging,” pages 80 to 82). you might want to test your Pulse Rate by typing in this program and running it. When your computer tells you to stand by . . ., place your fingertip (not your thumb) on the Lnner surface of your wrist, below the base of your thumb. (An artery runs under the skin there.) The computer will give you time to get ready and then say start! Count the number of beats until the computer asks you to stop. Then type in that number, and your computer will calculate how many times your heart is beating per minute.

Note that the last number on line 120 controls how long the computer times you. This number varies from computer to computer because some brands run faster than others. In addition, the timing of your computer may be slightly different from ours. Before actually using the program, you should first test it against the second hand of a watch to see that it times you for exactly 30 seconds. If the program is running fast or slow, increase or decrease the number in line 120. starting first with a change of 100.