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.
The Borg Scale is a method to measure a personâs perceived exertion rate. Developed by Stockholm University professor Gunnar Borg during the 1980s, the scale does not require any equipment, but asks participants who engage in physical activity to assess his or her perceived rate of exertion from light to strenuous. The scale measures exertion in a range between six and 20.
It is used in some research studies for that purpose, but may also be used in training programs to describe the intensity of training sessions. The scale of perceived exertion is how hard you feel your body is working, and therefore is a subjective measurement. The commonly used scale is based on the research of Gunnar Borg, and is therefore also called the Borg Scale. There are three versions of this scale on this site: 1  Borg 6-20 - the original scale as developed by Borg, with the ratings between 6-20 which can correspond to 1/10 of the exercise heart rate.