POSSIBILITIES OF A NON-INVASIVE DETECTION OF RECRUITMENT ORDER OF SKELETAL MUSCLE – NEW SUGGESTIONS IN EMG-PROCESSING

The aim of the present study is the presentation of new suggestions in EMG-processing. Using the examples of explosive MVCs and the high speed phase of sprint running the concerning two models dealing with recruitment order, fiber type contribution and fiber type characteristics try to uncover some deficits of present knowledge. In particular, the so far not respected impulse-force-relation of different fiber types and their consequences for EMGprocessing is discussed. Therefore two methods, a moving FFT and a digital band pass filtering, combined with a normalization of the resulting frequency bands are presented as a first attempt to solve the existing problems. Surface diagrams and graphs show interesting indications concerning the recruitment order and the use of frequency parameters

ESTIMATION OF POTENTIAL RISK OF ACL RUPTURE IN FEMALE SOCCER PLAYERS AND EFFECTIVENESS OF A PREVENTION TRAINING PROGRAM

The purpose of this study was to make an estimation of the potential risk of ACL rupture in female soccer players by means of video based analysis and controlled by biome-chanical testing as well as to relate to effects by carrying out an 8 week specific training program. Results show that video based screening seems to be suitable in order to achieve a good estimation of the risk for ACL injuries without large expenditure. The per-formed ACL prevention training program shows a slight reduction of the potential risk of ACL rupture

SCREENING TEST FOR THE POTENTIAL RISK OF ACL RUPTURE OF FEMALE AND MALE SOCCER PLAYERS

ACL rupture is a devastating injury. An analysis of risk factors and a consecutive preven-tion program might help to reduce the risk of injury. However there exists no screening test to identify the individual ACL-injury risk. The purpose of this study was to develop a screening test by which the potential risk of ACL rupture for female and male soccer players can be estimated. Testing procedure focussed on dynamical knee valgus in fron-tal plane during landing of a drop jump in normal and fatigued state. The results were ob-tained by 2D video analysis. Results show a wide range of dynamical knee valgus in both sexes with a 5.4 cm greater dynamical valgus of women emphasizing the distinctly higher risk potential for ACL injury of women. Screening tests seem to be suitable to achieve an estimation of the individual risk for ACL injuries without large expenditure