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Computerised analysis of Vengerov 's vibrato

There has always been a discussion whether to use one or the other vibrato, but it has never been clear what they refer to. The movement from the so-called arm vibrato actually comes from the shoulder and the elbow in different degrees, depending on the position of the violin. The wrist vibrato has its variations, as it can be done with one group of muscles or another depending on its initial position. What it is said repeatedly by many physiotherapists is that by making the same movement consistently it will provoque injuries to the tendons, joints and muscles. The best way to avoid this is to alternate between different types of vibrato. I made a computerized analysis of Vengerov vibrato and the results are very interesting.

In the video we can see marked the angle of the wrist, the line of the knuckles and a reference point on the middle phalange of the second finger to get an idea of the range of movement in the axis of the hand mainly generated by two joints (the elbow and the wrist) .