Influence of Different Sole Thickness on Biomechanical Parameters of Human lower Extremity
Medicine & Science in Sports & Exercise Supplemental
BACKGROUND: Different athletic shoe outsole thickness can influence human movement from the aspects of both performance enhancement and injury prevention.
PURPOSE: To investigate the influence of different outsole thickness on lower extremity muscle activity, kinematics, and kinetics during walking and running.
METHOD: Twelve male college students (age: 20.9±0.7, height: 172.0±2.1cm, body mass: 63.0±3.4 kg) were tested. Four sole thickness (original commercial shoe, 1, 2, and 3 cm increased outsole thickness) were tested. Elastic modulus was tested using a universal testing machine (Instron-5544, US). The running tests were performed on a treadmill with a fixed speed (3.33 m/s) and continued for 8min. Walking tests were performed on a force platform (AMTI, US, 400×600mm). A motion capture system (VICON, Oxford, UK) was used to obtain kinematic data. Wireless surface electromyography testing system (Noraxon, US) was used to obtain the surface electromyography (sEMG) data. One- way analysis of variance with repeat measures (ANOVA) was used to compare differences in muscle activity, kinematic, and kinetic outcome variables. Statistical significance was set at α = 0.05.
RESULTS: The 1 cm sole thickness has the highest elastic modulus (0.80MPa) and the 3cm is the lowest (0.25MPa). The co-contraction index value of 1cm group was significantly less than the others in both initial (0.55±0.14, P<0.05) and final (0.53±0.13, P<0.05) stage of running. At the toe off, the knee angle of 2 cm (131.0±9.5 deg, P<0.05) and 3 cm (132.7±4.6 deg, P<0.05) group increased significantly comparing to 0cm (125.0±5.4 deg) group in walking test.
CONCLUSION: The outsole thickness of 1cm reduced muscle co-contraction during running. Knee joint increased with the increasing of sole thickness at the time of toe off when walking.
Jia, Yi, Li Li.
"Influence of Different Sole Thickness on Biomechanical Parameters of Human lower Extremity."
Medicine & Science in Sports & Exercise Supplemental, 50 (5S): 815: American College of Sports Medicine (ACSM).
doi: 10.1249/01.mss.0000538684.05466.06 source: 10.1249/01.mss.0000538684.05466.06
© 2018 American College of Sports Medicine