Title	Influence of coloured insoles in drop landing
Authors	Cheung, Cheuk Hei
Advisors	Leung, Aaron Kl
Degree	Undergraduate
Issue Date	2018
Absctract	Injuries always occur in basketball rebound landing. Foot orthoses such as soft insoles were shown to have effects on reducing the risk of non-contact ACL injury during drop landing. However, the effect of soft insoles on drop landing has not been clearly addressed. Colour was reported to have effects on sport performances, but its psychological effects on sport performances is still unclear. The objective of this study is to examine the influences of coloured soft insoles on the kinematics and kinetics of the knee and ankle in bilateral drop landing. The experiment was undertaken in the Li Ning Sports Science Research Centre in Beijing. Twenty male recreational basketball players with normal feet, no colour blindness and injury on lower limbs in the past six months were recruited to participate in this study. Participants performed drop landing with two different heights (0.45m and 0.6m), and five different pairs of insoles (white, red, blue and black insoles with arch support; and white flat insoles), to examine the effects of arch support and colours in drop landing. Kinetic and kinematic parameters such as vertical ground reaction force, time to peak force, maximum loading rate, and angles, moments and powers of hip, knee and ankle joints were recorded by VICON, AMTI force plates and Visual 3D systems. Self-perception of landing performances with different insoles were obtained using 150mm Visual Analogue Scale. The effects of drop landing height and arch support were analyzed using two-way repeated measures ANOVA with IBM SPSS statistical software. Significant reduction in ankle eversion moment and trends of decreasing in the second peak of vertical ground reaction force were found in insole with arch support comparing to flat insole. There were significant increase in the second peak of the vertical ground reaction force and the maximum loading rate in the coloured arch support insoles. The knee flexion at initial ground contact and the maximum ankle dorsiflexion were also reduced. Coloured insoles, comparing to white insole, were suggested to have less impact force reduction ability. Since the above parameters are related to the occurrence of sports injury in drop landing, the results of this study give additional reference for design of insoles to prevent injury.
Subjects	Orthopedic apparatus Sports injuries -- Prevention
Publisher	Hong Kong Polytechnic University
Rights	All rights reserved.