Abstract
Anterior cruciate ligament (ACL) lesion represents one of the most dramatic sport injuries. Even though clinical screenings aiming at identifying subjects at risk of injuries are gaining popularity, the use of sophisticated equipment still represents a barrier towards their widespread use. This study aimed to test both reliability and repeatability of a new methodology to assess lower limb joints kinematics and kinetics directly on field with the aid of video cameras and plantar pressure insoles. Ten athletes and one case study (post ACL surgery) were assessed in a gait laboratory, while performing double leg squats, through the simultaneous acquisition of stereophotogrammetry, force plates, commercial video cameras and plantar pressure insoles. Different sources of errors were investigated and both reliability and repeatability analysis performed. Minimum and maximum RMSE values of 0.74% (right knee joint center trajectory) and 64.51%, respectively (ankle dorsi-plantarflexion moment), were detected. Excellent to good correlation was found for the majority of the measures, even though very poor and inverse between-trials correlation was found on a restricted number of trials especially for the ankle dorsi-plantarflexion moment. These findings could be used in combination with already available screening tools in order to provide more repeatable results.
Highlights
Results of the comparison between the center of pressure (COP) displacement recorded through the force Results of the comparison between the COP displacement recorded through the4force plates and the plantar pressure system, were reported in Table and plates and the plantar pressure system, were reported in 4 and showed the minimum Root mean square error (RMSE) value on the anterior/posterior COP range (24.6%)
When considering the overall results of the present study, lower impact of the videobased technology was revealed on the joint moment computation with respect to other sources of errors, such as the exclusion of the shear forces from the plantar pressure insoles measures or the fact that the “normal force” is derived from the pressure measured from an array of sensors
It should be mentioned that in most cases lower RMSE% values were recorded when comparing the joint moments retrieved by means of stereophotogrammetry and force plates with the ones obtained through video analysis and plantar pressure insoles
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Anterior cruciate ligament (ACL) ruptures represent one of the healthcare emergencies among sport injuries and have received much attention in recent years [1,2,3]. ACL injury can be the cause of long-term disability and is one of the most frequent causes of loss of a sport season [4,5]. It is estimated that the incidence of ACL ruptures range from 30 to 78 per 100,000 person-years, and 61–83% of athletes successfully return to sports [2,6] typically
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