Dynamometry is a method for measuring the contraction force of various muscle groups.
For dynamometry, there are different types of dynamometers. The most common spring dynamometer (Fig. 1).
The subject squeezes it with an outstretched arm. Compression force is indicated by an arrow on a special scale. Another modification is the Sternberg dynamometer (Fig. 2), which has two wide parallel handles, which the subject also squeezes with a brush.
There are mercury dynamometers (Fig. 3), in which the pressure force on the sensor is determined using a mercury manometer.
Fig. 2. Sternberg dynamometer
Fig. 1. Spring Dynamometer
Fig. 3. Mercury piston dynamometer (scheme): 1 - barometric tube; 2 - large piston; 3 - mercury ; 4 - small piston; 5 - water; 6 - cylinder for compression; 7 - additional part instead of a cylinder.
A variety of dynamometry - dynamography - a method that allows you to record the force of muscle contraction graphically in the form of a series of curves. This method reflects the dynamics of a long muscular effort of a certain muscle group.
Dynamometer is used in anthropology, anthropometry , neuropathology, balneology, etc.