Fun Facts. 1  Table tennis has been an Olympic sport since 1988. 2  In professional table-tennis volleys, the ball can reach speeds as high as 90 miles per hour. 3  Table tennis is the national sport of China.  Table tennis is the second most played sport in the world, behind soccer.
In medicine this is used to document the patient's exertion during a test, and sports coaches use the scale to assess the intensity of training and competition. The original scale introduced by Gunnar Borg rated exertion on a scale of 6-20. Borg then constructed a category (C) ratio (R) scale, the Borg CR10 Scale. This is especially used in clinical diagnosis of breathlessness and dyspnea, chest pain, angina and musculo-skeletal pain.
Use your feelings of exertion rather than measures such as speed while running or cycling or comparing yourself to someone else. Then assign your exertion a number from 6 to 20 on the Borg Rating of Perceived Exertion scale. The scale starts at 6, which means you feel no exertion, similar to simply standing still. Level 9 is what you feel like when you are walking at an easy pace.