This study investigated asymmetry between lower extremities during the landing and takeoff phases of a vertical drop jump (VDJ) in adolescent athletes following anterior cruciate ligament reconstruction (ACLR) examined if performance was affected by reducing height. Thirty-three who underwent ACLR were referred for 3D biomechanical assessment before returning to play (mean age 15.9, SD 1.3 year...

Joint moments are commonly used to characterize gait. Factors like height and weight influence these moments. This study determined which of two commonly used normalization methods, body mass or body weight times height, most reduced the effects of height and weight on peak hip, knee, and ankle external moments during walking. The effectiveness of each normalization method in reducing gender di...

Marcus Brown Department of Mechanical and Materials Engineering, Queen’s University, Kingston, Canada Background Bracing is a treatment option for medial knee osteoarthritis [1] that unloads the medial knee through the application of an external moment (brace moment) [2]. In theory, the brace moment is designed to reduce the total external adduction moment, as disease severity and external addu...

In a number of recent studies we used computer modeling to investigate the evolution of muscle leverage (moment arms) and function in extant and extinct archosaur lineages (crocodilians, dinosaurs including birds and pterosaurs). These studies sought to quantify the level of disparity and convergence in muscle moment arms during the evolution of bipedal and quadrupedal posture in various indepe...

Interval running methodologies simulate competition and training conditions, with the aim of enhancing an athletes’ ability to cope constant deceleration, acceleration, sudden changes in direction, as associated athletic performance challenges. Fifteen male athletes were recruited this study, which anterior cruciate ligament was modeled a nonlinear elastic passive soft tissue OpenSim 4.2. Parti...

Researchers have found that poor postoperative outcomes in pain and function are associated with poor loading patterns on the knee joint, specifically high knee adduction moment, high knee flexion moment and low knee extension moment. These pathological loading patterns are usually present in these patients prior to surgery and are retained after surgery. With time these loading patterns will l...

Many conservative treatments exist for medial knee osteoarthritis (OA) which aims to reduce the external knee adduction moment (EKAM). The objective of this study was to determine the difference between different shoes and lateral wedge insoles on EKAM, knee adduction angular impulse (KAAI), external knee flexion moment, pain, and comfort when walking in individuals with medial knee OA. Seventy...

Recently, the increase of transfemoral amputees from industrial disasters, traffic accidents, vascular diseases and aging is emerging as a social issue. For transfemoral amputees, it is very important to recover their lost functions. Myoplasty, which is one of above-knee amputation methods that sutures muscles on the femoral stump, is used more commonly than other operation methods because it i...