Naslov
The 3D kinematic efficiency of Usain Bolt's sprinting stride

Autori
Antekolović, Ljubomir ; Baković, Marijo ; Đurković, Tomislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of 18th annual Congress of the European College of Sport Science, ECSS Barcelona 2013 / Balagué, N., Torrents, C., Vilanova, A., Cadefau, J., Tarragó, R., Tsolakidis, E. - Barcelona : European College of Sport Science (ECSS), 2013, 520-520

ISBN
978-84-695-7786-8

Skup
18th annual Congress of the European College of Sport Science, ECSS Barcelona 2013

Mjesto i datum
Barcelona, Španjolska, 26.06.2013. - 29.06.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
kinematic parameters; 100 meters sprint; Usain Bolt

Sažetak
The efficiency of sprinting velocity depend on the optimal proportion of starting phase, acceleration phase, maximal velocity phase and deceleration phase. Maximal velocity is one of the most important factors of sprint (Coh and Dolenec, 2008) and in 100m race it is mostly maintained from 60 m to 90 m. Biomechanical parameters of sprinting performance made on elite sprinters are important for the scientist and coaches. This study is conducted to obtain 3D kinematic parameters of sprinting stride of the top level male sprinter during the 100 m race. The video acquisition was done in competition conditions during the 100 m race in Zagreb, Croatia (IAAF World Challenge Zagreb 2011). The subject of this study was Usain Bolt (height 196 cm ; weight 86 kg) a world record holder 100m and 200m (9.58 sec and 19.19 sec). Three miniDV digital cameras (Sony HDR-HC9E) operating at 50 frames per second filmed space on track between 65 m and 75 m. The space was defined by cube (180cmx180cmx90cm) placed on track and filmed after the competition. 3D kinematic data calculations were done with APAS (Ariel Dynamics Inc., San Diego, CA) using a 15- segment model of sprinter’s body (Dempster, 1955). Usain Bolt won this competition with 9.85 sec. His stride lengths of sprinting cycle left-right-left contact (from 63.42 m to 68.92 m of 100 m track) were 278.41 cm and 272.81 cm. The heights of the center of mass (CM) at touchdown (TD), amortization (AM) and takeoff (TO) during left foot support phase were 111.76 cm, 111.62 cm and 115.99 cm. The heights of CM during right foot support phase were 114.63 cm (TD), 113.31 cm (AM) and 115.04 cm (TO). The heights of CM during flight phases were 119.20 cm and 118.51 cm. The AM angles were 144.15˚ (left) and 131.71˚ (right). The horizontal projection of CM in braking phase was 21.42 cm on left foot and 14.56 cm on the right foot. In the propulsion phase the projection of CM was 65.36 cm and 65.68 cm. An average horizontal velocity of CM during observed strides was 12.36 m/sec which is 44.50 km/h.

Izvorni jezik
Engleski

Znanstvena područja
Pedagogija

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