Kinemetry

In physics, movements are understood as changes in the position of bodies in space and time. This presupposes that the movement (partial movement) is described and observed in relation to a reference system.
In a simple categorization, progressive movements (translatory) and rotary movements (rotatory) are distinguished. In many sports, mixed forms of translations and rotations can also be found.
Furthermore, movements are differentiated according to their temporal course into uniform and non-uniform movements. The uniform movement takes place with constant speed, the non-uniform shows a changing speed course.
The simplest movement characteristics, which are raised by a Kinemetrie, concern the way (length) and the time. From these, further descriptive variables can be calculated, such as the average velocity (distance traveled divided by time) or the average acceleration (change in velocity divided by time taken).

In addition to special measurement methods that allow direct distance measurement or time measurement, kinemetry is mostly performed using (digital) video analysis. Here, a movement can be captured over a sequence of any length by video images, which are then digitized on a PC and converted into 2D or  3D coordinates (see photo examples from swimming and the overhead perspective in tennis). In parallel, the measurement data can also be combined with other examination methods (e.g. electromyography) and exported in various data formats.
The analysis software we use comes from the company "SIMI Motion". The SIMI Motion software is designed for the acquisition and analysis of various movements in the fields of sports, human and veterinary medicine, rehabilitation, robotics, 3D computer animation (CG), etc.. Moving objects are captured with digital video or high-speed cameras and converted into 2D or 3D data.
In addition, SIMI Motion enables synchronized recording of image sequences from professional high-speed cameras or from up to six commercially available DV cameras connected to a single PC via a FireWire interface.

In addition to SIMI Motion, we also use freeware programs that allow easy analysis of AVI files, especially for teaching teacher candidates. The programs used by come from the Uni: Viana and from the University of Mainz: VIMPS.