Exercise ball
An exercise ball is a great ball of colored, highly elastic plastic material with which one can perform gymnastic exercises.
A second possibility to use it provides in office or at home as a temporary replacement for the office chair at the desk. The exercise ball is very easy on the back, because you over while you sit all the time on him, easily changes its position. Nevertheless, it should not spend the whole day, but only intermittently about 30 to 90 minutes on him one. Because of its health benefits, particularly for the spine, it is recommended by doctors and health insurance companies. Occupational safety specialists advise, however, from being used as office chair, since due to the lack of back support and stability there is considerable risk of accidents.
In obstetrics, this ball is a recognized tool for births. The Entbindende can sit with her legs spread on the ball to open the birth canal and to use gravity while holding the partner from behind and support. A still very popular application possibility, especially in school sports, the game is Pezzifußball - also called elephant ball.
Pezziball
The " PEZZI " exercise ball, fitness ball short, is the most famous representative of the gym ball. The name is a word mark of the Italian company Ledragomma that manufactures since 1950 Exercise balls.
Technical Details
An average exercise ball - which is also suitable for sitting ( that is, a sitting ball ) - usually has a diameter between 45 cm and 75 cm and is very firmly inflated. Exercise balls, which are intended to sit on, in addition to feature supports to stabilize the ball. In exercise balls, which are not intended to sit, there is the danger of burst of the ball. This may be associated with the risk of injury when it happens while a user sits on it. The optimal size of the ball depends on the height of the user. He should be about as high as the chair on which you sit otherwise. In addition, the values can be used in the table below as a guide. However, one should always test - sit or do gymnastics to get a feel for the actual required size.
Security
Exercise balls are intended for sitting are often differentiated according to their security. Under security refers to the behavior of the skin in case of damage, eg by sharp objects such as broken glass, debris or sharp-edged metal. If the outer skin of a gym ball, which is not space safe, damaged, can suddenly develop a longer crack and the total volume of air escapes immediately.
The outer skin of a space- safe gymnastics Balls prevented even with a damaged another tearing. Thus, the air escapes slowly and allows the user to descend in time from the ball. The security, however, is given only up to a certain weight load. Usually this is from 70 kg to 100 kg. Since there are no standardized rules for determining and testing the resilience, some producers only a static load ( the user sits motionless and the ball is thus only by the weight of the person charged ). More rarely an indication of the dynamic load value (the user moves on the ball ), but this corresponds to the actual usage. Safe Place balls are usually referred to by the producers as a burst or burst Resistant Proof.
The security is accomplished by a thicker outer skin ( 0.5 mm to 3 mm) and a specific material mix.
The lack of standard test has occurred in the past in an accident with balls that have been referred to as burst- resistant and yet burst.
To avoid accidents caused by a fall, the ball can be filled with gym exercises with less air. Thus, the ball is stable on the floor. A further possibility, which serves for the stabilization, the ball shell ( Rest) made of plastic. These measures are also applicable to the sitting ball.