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Spatio-temporal evolution of joint space width (JSW) during motion is of great importance to help with early treatment plans for degenerative joint diseases like osteoarthritis (OA). However, only a few studies have attempted to quantify the JSW from moving joints and the accuracy of measurements al...
Hamstring strain injuries (HSIs) are the most common and recurrent soft tissue injury in Australian Rules Football (ARF) [1], with only minor reductions in prevalence observed over the past 20 years. While common belief suggests that hamstring injuries are most likely to occur during terminal swing ...
This abstract describes an analysis technique using a single, sacrum-worn inertial sensor to estimate kinetic descriptors of sprint performance. The ability of the proposed technique to assess sprint performance is demonstrated and compared to a previously validated photocell-based method.
Our purpose was to examine the effects of combined pelvic corrective force and non-paretic leg resistance force on paretic leg muscle activity during treadmill walking in individuals with stroke. Nine subjects with stroke participated. A corrective force to the pelvis toward the paretic leg and a re...
With the growing popularity of the sport of volleyball, there are concerns of lower extremity injuries in front-row players. Different landing mechanics experienced by the three front row positions give insight into possible causes of common injuries of players. Twelve female Division II collegiate ...
The talar articular surface was divided into medial and lateral areas. Three force reaction elements were embedded in each area to calculate the contact force in the tibiotalar joint. Walking data of normal and flatfoot were measured using motion capture, force plate, and pressure mat. We performed ...
This study compared the MilestonePod (MSP) wireless running sensor to a fully instrumented treadmill (FIT) in measuring average vertical loading rate (AVLR), ground contact time (GCT), cadence, and stride length. MSP data from treadmill was also compared to MSP data during outdoor overground running...
Anatomical evidence points to the existence of 6-8 architecturally distinct partitions within the pectoralis major (PM), suggesting differential contributions of these partitions to humeral movement. This study investigated the activation of PM partitions using high-density electromyography in three...
Differences in knee ligament moment arms might contribute to the sex-disparity in knee ligament injuries. We used a population model of the knee to create finite element simulations of varus-valgus rotations and found that the moment arms of the medial and lateral collateral ligaments were smaller i...
Flip-flop style footwear is assumed to increase slip risk due to shallow treads and non-rigid coupling to the foot. For provoked slips in dry and wet (water) conditions, differences in adhesion effects, absolute normal force, and contact area are suspected to have influenced the coefficient of frict...
This study aims to design a three-dimensional computational model to simulate walking for both able-bodied individuals and prosthesis users. The inverse dynamics model is driven using able-bodied gait kinematics. The model calculates the muscle forces required to produce the measured kinematics, bot...
We propose that the metabolic cost of walking can be estimated from a simple mechanical model composed of centre of mass velocity redirection, body weight support, torso and swing dynamics, and foot-to-ground clearance. From human biomechanical walking data provided by the ISB 2019 metabolic cost mo...
The purpose of this study was to investigate the effects of altered talus alignments on ankle joint contact forces (AJF) during vertical hopping. Motion capture and ground reaction force data were collected as ten participants hopped at 2.4 Hz. Various cases of anterior translation and medial rotati...
The objective of this study was to measure the sensitivity of outside assessments compared to in-lab measures in older adults with history of falls. Participants performed indoor and outdoor walking trials. Motion capture and accelerometers were used to measure gait. Only Lyapunov Exponent (LyE) of ...
Previous research has shown that program-based identification was a reliable method to identify lumbar spine vertebrae for epidural procedures. The consistency and temporal efficiency of this program-based identification (PBI) was found to be vastly greater than that of human identification. Likewis...
In analyzing the accuracy of trainer form scores as a quantitative assessment of athletic form, wearables were used to compare the individuals’ form score to their biomechanics. The Lock and Load drill, one that requires control to lift the opposite leg and hand simultaneously off the ground from ...
Patients with developmental dysplasia of the hip (DDH) adopt movement compensations to stabilize the hip during sloped walking, but compensations vary across degrees of inclination. Patients with DDH increased activation demand on the hip abductors during level walking, while increasing the co-activ...
Partial power assistance is a promising approach to reduce the deleterious upper extremity loads in manual wheelchair locomotion. This study investigates two potential control strategies to govern the wheelchair-user interaction: i) an impedance control strategy, where a reference, desired system dy...
Walking unassisted resulted in less trunk flexion than using either the KB Balance Trainer or a traditional walker at self-selected speed. There were no significant kinematics differences between the KB Balance Trainer and a traditional walker.
Effect of surface profile of a Co-28Cr-6Mo alloy (ASTM F-75) disc on wear behavior of an ultra-high-molecular-weight polyethylene (GUR1050) pin was investigated by using a pin-on-disc wear testing machine with multi-directional pathways. The surface of a Co-28Cr-6Mo alloy disc had a waviness curve f...
Finite element modeling can be used to evaluate the effects of altered loading conditions on the knee joint stresses, and thus to predict possible failure locations. The aim was to generate finite element models of ACL reconstructed patients (n = 5) with relatively simple soft tissue materials to id...
The purpose of this study is to understand variable gearing in medial gastrocnemius (MG) muscle of chronic stroke survivors, as estimated from the “fascicle gear ratio.” Five stroke survivors performed isometric plantarflexions at different ankle joint angles. During each contraction, ankle torq...
Gait asymmetry is detrimental as it alters knee stability. To better understand how gait asymmetry affects knee stability fifteen healthy individuals performed an asymmetric walking protocol. Autoregressive (AR) modelling was employed to quantitatively and graphically delineate differences in peak s...
To observe differences in centre of pressure (COP) trajectories of 15 low back pain subjects during gait at three different walking speeds, a vector field statistical analysis was conducted. Medial-lateral COP showed medialisation (1) at fast walking speed, at transition between shock absorption pha...
Providing load during dynamic lower limb CT acquisition has not been possible yet. This study aimed to explore the feasibility of a new device to create a weight-bearing condition during horizontal squat (HS)and to compare it to a wall orthostatic squat (OS). 3D kinematics and surface EMG (sEMG) wer...
The purpose of this study was to compare measures of gait temporo-spatial parameters of older adults walking outdoors collected using a GAITRite® instrumented mat and the IMU-based Xsens system. 10 older adults were evaluated during the gait in a public park. Velocity, cadence, step length, swing a...
The aim of this study was to investigate and evaluate the role of mechanical and neural modulations after stretch-shortening cycles (SSCs). Net ankle joint torque and H-reflexes of triceps surae were obtained during different tetanic contraction conditions, elicited by tibial nerve stimulation. Whil...
This work proposes a method for creating a finite element model (FEM) of knee joints considering the ligament geometry and material properties. Experiments were conducted to obtain the material properties of the anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL) through a ten...
While the overall incidence rate for injuries in skiing has been found to be decreasing in recent years, evidence has shown that severe injuries to the spine and spinal cord have increased. The presented review of the current literature highlights the lack of evidence regarding the efficacy of back ...
In this study, a simple bipedal model with an upper body walks down on a gentle moving slope to clarify the effect of trunk swinging behaviors on gait on a moving slope via numerical simulation. Gaits with three types of trunk swinging behaviors, forward swinging (FS), backward swinging (BS), and no...
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