TY - JOUR AU - Figueiredo, Pedro A2 - Figueiredo, Pedro A2 - Sanders, R. A2 - Gorski, T. A2 - Vilas-Boas, J.P. A2 - Fernandes, R.J. DB - BISp DP - BISp KW - Bewegungsanalyse KW - Bewegungsbeobachtung KW - Blutlaktat KW - Drehwinkel KW - Extremität, obere KW - Extremität, untere KW - Filmkamera KW - Flexor KW - Gelenkwinkel KW - Geschwindigkeitsmessung KW - Kinematik KW - Kraulschwimmen KW - Körpersegment KW - Leistungsdiagnostik KW - M. biceps brachii KW - M. trapezius KW - M. triceps brachii KW - Muskelaktivität KW - Neigungswinkel KW - Oberflächen-EMG KW - Phasenstruktur KW - Schlagfrequenz KW - Schwimmgeschwindigkeit KW - Schwimmsport KW - Schwimmzug KW - Sportmedizin KW - Trainingswissenschaft KW - Tretfrequenz KW - Untersuchung, vergleichende KW - Varianzanalyse KW - Videotechnik KW - Wettkampfbedingung KW - Wettkampfbelastung KW - Winkelgeschwindigkeit LA - eng TI - Kinematic and electromyographic changes during 200 m front crawl at race pace TT - Kinematische und elektromyographische Veränderungen während eines 200-m-Kraulschwimmens bei Renntempo PY - 2013 N2 - The purpose of this study was to analyse eventual kinematic and electromyographic changes during a maximal 200 m front crawl at race pace. 10 male international level swimmers performed a 200 m maximal front crawl test. Images were recorded by 2 above and 4 under water cameras, and electromyographic signals (EMG) of 7 upper and lower limbs muscles were analysed for 1 stroke cycle in each 50 m lap. Capillary blood lactate concentrations were collected before and after the test. The variables of interest were: swimming speed, stroke length, stroke and kick frequency, hand angular velocity, upper limb and foot displacement, elbow angle, shoulder and roll angle, duration of stroke phases, and EMG for each muscle in each stroke phase. Generally, the kinematic parameters decreased, and a relative duration increased for the entry and pull phases and decreased for the recovery phase. Muscle activation of flexor carpi radialis, biceps brachii, triceps brachii, peitoral major and upper trapezius increased during specific stroke phases over the test. Blood lactate concentration increased significantly after the test. These findings suggest the occurrence of fatigue, characterised by changes in kinematic parameters and selective changes in upper limbs muscle activation according to muscle action. Verf.-Referat L2 - https://dx.doi.org/10.1055/s-0032-1321889 DO - 10.1055/s-0032-1321889 SP - S. 49-5 SN - 0172-4622 JO - International journal of sports medicine IS - 1 VL - 34 M3 - Gedruckte Ressource M3 - Elektronische Ressource (online) ID - PU201304002750 ER -