A PHOTO-OPTICAL METHOD FOR THE AQUlSlTlON OF BIOMECHANICAL DATA IN SWIMMERS
AbstractThe author presents and discuss the utility of a photo-optical method for the evaluation of swimming breaststroke technique. It consists on photographic registration, with prolonged exposition, of the trace produced by a pulse light device attached to the hip of the swimmer. This device uses 24 LEDs as light source, flashes every 0.2 sec (5 Hz) and is powered by a 9 v battery. After digitizing and processing, data allow insight on: (i) swimming velocity fluctuation curves; (ii) per fase hip acceleration and (iii) per fase resultant impulses estimation. data can be used on the comparison of two or more variants of a swimming technique, on the evaluation of individual technical progresses, and on comparisons of particular subjects technique with top level swimmers. Examples will be presented and discussed.
Authors can retain copyright, while granting the International Society of Biomechanics in Sports (ISBS) the right of first publication.