ISBS (International Society of Biomechanics in Sports): Conference Proceedings Archive
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KINEMATIC ANALYSIS OF 100M HURDLE RACE IN FIRE SPORT
Full text linkFire sport is a discipline based on maximal movement velocity and optimal muscle-nerve co-ordination during the implementation of supporting movement activity. One of the most attractive disciplines is the 100m running event with various hurdles. The conclusive moment for passing a beam-hurdle is the way of starting towards the board. For analysis of this activity we used four video cameras and photocells to measure time parameters. According to efficiency we divided the monitored file (n=22, average age 24.37 years) into three groups. There is a trend, in order to maintain the velocity in the group of the best runners during the start, towards getting over the hurdle by executing the take off from the board is managed from a more forward position. In subjects with lowest efficiency there is a lowering of the ankle position during the runner’s contact with a rising board manifested via the braking rate
DEVELOPMENT OF A FIELD TESTING PROTOCOL FOR THE BIOMECHANICAL ANALYSIS OF SNOWBOARD JUMP LANDINGS – A PILOT STUDY
Full text linkA biomechanical analysis of snowboard jump landings is yet to be published. The purpose of this work was to develop a protocol to allow the collection of meaningful data in a real snowboarding environment. A video calibration technique was developed to provide superior measurement accuracy over a standard central cube calibration. The accuracy of a snowboard mounted force plate was assessed under various loading conditions. It was concluded that its performance was satisfactory and comparable to previous designs of a similar nature. Once the test protocol was finalised, data were collected from three experienced snowboarders performing jumps. The loads applied at the lead foot were found to be of high magnitude. Based on previous cadaver research, these high loads coupled with the kinematic data revealed a potential for ankle injury during snowboard landing events
THE EFFECT OF STATIC STRETCHING ON MAXIMAL VOLUNTARY CONTRACTION AND FORCE-TIME CURVE CHARACTERISTICS
Full text linkThe purpose of this study was to examine the effect of static stretching of the lower limbs on maximal voluntary contraction (MVC) and isometric force-time curve characteristics (IFTC) of leg extensor muscles and integrated electromyographic activity of rectus femoris (EMGRF), biceps femoris (EMGBF) and gastrocnemius (EMGGS) muscles. Ten healthy physical education students were tested for MVC, IFTC, and EMG activity of the above muscles after a jogging and a jogging/stretch protocol of the lower limbs. There were no significant changes in MVC, IFTC, EMGBF, and EMGGS between jogging and jogging/stretch measurements. A significant decrease was observed in EMGRF. The results of this study indicated that a moderate volume of static stretching of the lower limbs did not impact significantly the majority of the variables examined
METHOD FOR THE DETECTION OF FATIGUE DURING GYMNASTICS TRAINING
Full text linkThe purpose of this study was to determine if acceleration measured at the pelvis was a suitable indicator of fatigue in gymnasts. Fourteen gymnasts performed vertical jumps and drop landings pre and post a fatiguing jumping activity. Peak acceleration during landing for jumps and drops increased significantly after fatiguing activity. Acceleration is a tool that can be collected with limited disruption to gymnastics training and an increase in peak acceleration during landing of simple jumps appears to be a useful tool for determining whether gymnasts are fatigued