Motion capture systems are used in the analysis and interpretation of athlete movement patterns for a variety reasons, but data integrity remains critical regardless. The extent to which marker location or constraining degrees freedom (DOF) biomechanical model impacts on this lacks consensus. Ten elite academy footballers performed bilateral overhead squats using marker-based motion system. Kin...

The purpose of this study was to investigate the rear knee angle range in the set position that allows sprinters to reach greater propulsion on the rear block during the sprint start. Eleven university-track team sprinters performed the sprint start using three rear knee angle conditions: 90°, 115° and 135°. A motion capture system consisting of 8 digital cameras (250 Hz) was used to record kin...

PEEK-OPTIMA™ (Invibio Ltd, UK) has been considered as an alternative joint arthroplasty bearing material due to its favourable mechanical properties and the biocompatibility of its wear debris. In this study, the potential to use injection moulded PEEK-OPTIMA™ as an alternative to cobalt chrome in the femoral component of a total knee replacement was investigated in terms of its wear performanc...

Abstract Muscle atrophy refers to the thinning of muscles losing their tone and strength. Knee rehabilitators are usually based on a 4-bar system due its simplicity, passive movement sought rehabilitation joints, seeking comfort in patient. This research determines critical movements correct selection mechanism, considering restrictions according rules flat mechanisms. In addition, kinematic an...

Asymmetries in sagittal plane knee kinetics have been identified as a risk factor for anterior cruciate ligament (ACL) re-injury. Clinical tools are needed to identify the asymmetries. This study examined the relationships between knee kinetic asymmetries and ground reaction force (GRF) asymmetries during athletic tasks in adolescent patients following ACL reconstruction (ACL-R). Kinematic and ...

INTRODUCTION Both semitendinosus-gracilis (STG) and patella tendon bone (PTB) are frequently selected grafts for anterior cruciate ligament (ACL) reconstruction in dancers. Although STG and PTB reconstruction outcomes appear to be outwardly similar when assessing the knee joint in isolation, it is unclear whether there are limitations in multi-joint control following these procedures. Kinematic...

In summary, if TKRs are to be performed in patients who are younger and more active than those who had the initial procedures in the 1970s and 1980s, better wear performance is imperative for long-term durability, especially if surgeons continue to consider the versatility associated with modular knee-replacement systems to be a necessity. At least with some designs, including the Oxford knee a...

Estimates of knee joint loadings were calculated for 12 normal subjects from kinematic and kinetic measures obtained during both level and downhill walking. The maximum tibiofemoral compressive force reached an average load of 3.9 times body-weight (BW) for level walking and 8 times BW for downhill walking, in each instance during the early stance phase. Muscle forces contributed 80% of the max...