Question

Data of elite sprinters indicate that faster athletes realize shorter ground contact times compared with slower individuals. Furthermore, the importance of the so- called "front side mechanics" for elite sprint performance is frequently em weight su possible negative effects of this body-weight supporting device on sprint running kinematics, which was not clanified in previous studies. Eleven well-trained by researchers and coaches. Recently, it was demonstrated that using a body- ing kite during full-effort sprints in highly trained sprinters leads to a reduction in ground contact time. The aim of this study was to investigate fying 20-m sprints under 2 conditions: (a) free sprint (FS; an t cycle char y-weight s recorded during the high-speed phase by a 16 camera 3D-system (Vicon), an optical acquisition system (Optojump-next), and a high-speed camera. Paired sample t-tests and Cohens d effect site were used to determine dfferences between sprinting conditions Compared with FS BwS caused a decrease in ground contact time by 5.6% and an increase in air time by 5 % (both p < 0.001 ), whereas stride length and rate remar ed unchanged. Furthermore, a reduced hip oint extension at and after an increased maximal hip joint flexion (i.e, high knee position), and a smaller horizontal distance of the touchdown to the center of gravity could be observed (all p <0.01). These results indicate no negative effects on front side mechanics during BWS and that sprinting with a body weight supporting kite seems to be a highly specific method to reduce ground contact time in well-trained sprinters Well-trained sprinters Center of gra Running kinematics Body-weight supported sprint

Answer 1

Answer: Running kinematics

( Running Kinematics is the motioni in human which includes the study of the positions, angles, velocities, and accelerations of body segments and joints during motion.)