Vergleich ausgewählter kinematischer Parameter der späten Schwungphase während eines Sprints, isokinetischer Stärke und Flexibilität bei männlichen Fußballspielern mit und ohne anteriore Schwenkbewegung,Comparing selected kinematic parameters of the late swing phase during a sprint, isokinetic strength, and flexibility in male soccer players with and without anterior pelvic tilt
Introduction and theoretical background Soccer is a competitive sport in which the players suffer a high amount of injury specifically muscle strain i.e. hamstring strain. Hamstring strain can be a categorized into two forms: contact or non-contact. The non-contact has been studied and the late swing phase has been proposed as the time point where the muscle is likely to suffer from an injury due to the lengthening occurring with regards to is normal length when standing upright. The literature suggests that the anterior tilt of the pelvis increases the risk of sustaining a hamstring injury while performing a sprint at the late swing phase. It is justified that the increase of the pelvis angle would lead to an increase in the musculotendon tension, which can eventually predispose the hamstring to sustain an injury. However, the kinematics and muscular activity of the pelvis, hip and knee region while performing a sprint at the late swing phase in soccer players with and without anterior pelvic tilt has yet to be fully understood. Furthermore, risk factors such as flexibility and strength has been extensively studied, but a controversy yet remains as to if a deficiency in these parameters could predict the outcome of an injury, specifically hamstring strain. The previous studies did not however, incorporated the amount of pelvic tilt into their measurements, in order to analyse its relationship with the outcome of flexibility and strength results. The aim of this study was to theoretically and empirically analyze the association of pelvic tilt with hip and hamstring muscle flexibility, the EMG and kinematics of late swing phase while sprinting, and maximum isokinetic eccentric and concentric strength of the knee and hip muscles as well as the conventional and functional ratios. Hypotheses Hamstring flexibility differs between soccer players with and without anterior pelvic tilt. Hip flexors’ flexibility differs between soccer players with and without anterior pelvic tilt. Sagittal kinematic parameters i.e. knee, ...