Abstract Archive

Pathomechanics of diabetic foot ulceration has been largely investigated by plantar loading measurements, and recently also by human motion analyses [1]. Rarely medical imaging has been used, because this is static, and also radiograms are in 2D, and standard CT scans are performed in supine, i.e. i...

A custom-built continuous wave radar was used to examine temporo-spatial gait parameters on healthy adults walking on a treadmill. Data simultaneously collected by the radar and motion capture cameras was analysed and compared to validate the radars accuracy. Excellent intra-class correlations were ...

The purpose of this study was to investigate effect of shoes midsole stiffness on biomechanics of lower extremity joints during Lay-Up (LU) jumping with different stiff midsole shoes. Thirty participants who wore stiff midsole shoes and control shoes performed LU jumps. Kinematics and ground reactio...

Asymmetric loading of unilateral bone-anchored limb prostheses in walking animals has been attributed to low power production at the passive ankle prosthesis due to high stiffness of the prosthetic foot. We compared power developed by a bone-anchored prosthesis with stiff and compliant feet during w...

Anterior cervical discectomy fusion has a complication in which failure and subsidence of the allograft spacer occurs. In this study, the failure and subsidence risk stresses on allograft spacer were quantitatively analyzed using 6 different post-op models of ACDF with allograft spacer coupled with ...

Mechanisms for rapid stroke-induced bone loss are unknown. Using a mouse stroke model, we examined whether vascular changes in bone may contribute. Compared to sham, stroke mice had transiently lower perfusion yet higher blood vessel volume in hindlimb bones; these vessels were larger and located fa...

Transient responses and whole-trial estimates of commonly used center of pressure parameters have been reported to provide clinically-relevant insight into postural control. In this study, correlations between transient features of commonly used center of pressure parameters and whole-trial estimate...

We aimed to determine whether calf muscle morphology or function differed between medial tibial stress syndrome (MTSS) symptomatic and asymptomatic long-distance runners. Muscle thickness and strength of the superficial posterior lower leg compartment and calf muscle endurance were assessed for 8 sy...

Gait modification provides a promising method for the treatment of medial knee osteoarthritis (OA). Although gait modifications have been identified to lower the knee adduction moment (KAM), the potential effect on the medial contact force (MCF) are unclear. This study aims at evaluating the effect ...

Stride time variability in gait is a factor associated with falls in aging adults, especially in females. This sex difference in aging may originate from differences in motor output variability at individual joints. We analysed sagittal plane ankle, knee, and hip joint angles in gait from a large sa...

To determine the feasibility of utilizing gyroscopic data to differentiate common gait perturbations, we compared the resultant angular velocities measured with optical motion capture (OMC) and Inertial Measurement Units (IMUs) in the feet and shank during running. The systems were tested under 4 di...

Treadmills are of utmost importance in several fields of research. Treadmills can differ considerable in their dimension, motor power and belt velocity regulation [1]. Therefore, we developed a method that allows researchers to quantify instantaneous belt velocity quickly using motion capture techno...

The patellofemoral dysfunction (PFD) is commonly related to changes in dynamic stabilization of the knee, mainly during activities as descending stairs, where there is higher stress to the joint. The aim of this study was to angles during the step-down test in the healthy knee and the knee with PFD ...

Runners with active plantar fasciitis (PF) (n=28) demonstrated higher vertical load rates (LRs) compared to healthy controls (CON). These differences were consistent across rearfoot strikers (RFS) and forefoot strikers (FFS). Further, FFS appeared to exhibit higher lateral LRs, where RFS showed lowe...

Shoulder joint is subjected to a very demanding role for athletes as well as workers lifting weights above their shoulders. Type II SLAP (Superior Labral Anterior to Posterior) lesion is the most common type of SLAP. CT scan images were obtained from a patient's shoulder diagnosed with type II SLAP ...

With future applications of torso electromyograms (EMG) to control dexterous robotic devices in vision, the static contraction of several torso muscles was characterized during EMG-based target-matching contractions in healthy young adults. The resulting data provided empirical bases upon which indi...

Inertial measurement units (IMUs) are one of the most practical alternatives to optoelectronic systems for human motion analysis. Their low price, flexibility, and ease of use make them highly attractive, as they promise to facilitate out-of-clinic patient monitoring and therapy for a wide range of ...

A total number of 20 young adults participated in a walking trial followed by an unexpected slip. The COM height, single/double stance phase duration, and angular momentum where calculated and compared between mild and severe slippers, during a full gait cycle and an additional 30% of gait cycle tim...

Robotic assistance in rehabilitation is becoming more and more popular. However, little is known about how the robot's support affects the muscular activation underlying the therapeutic exercise. To investigate the effect of robotic assistance on muscular activation 20 healthy subjects performed the...

This experiment aims to determine the connection between auditory cueing and how a person’s gait adjusts to the cadence of a metronome. In this study, eight healthy young participants walked at their preferred cadence and at a calculated rate of 20% increased and decreased cadence. We found that d...

The results obtained using the conventional method of measuring the center of pressure (COP) trajectory during gait are influenced by the foot progression angle. To correct this, a method was developed and differences in measurements between the new and conventional methods were identified. The subj...

Healthy populations are often assumed to have near identical movement patterns while asymmetry is commonly associated with pathology. Many current measures of symmetry are limited to discrete events, or involve high level mathematics that do not translate well to a clinical setting. The proposed Ave...

An analytic theory is developed that determines the conditions for sagittal plane rotation (referred to as a “pitchover”) of a mountain bike and rider. The model assumes a rigid geometry of the bike and rider, but energy loss is approximated using a variable coefficient of restitution. Two confi...

Asymmetric loading such as carrying bags and side-pack on one side of the body alter individuals’ gait, posture, as well as trunk and lower extremity biomechanics. The primary hip abductor, gluteus medius, is the main contributor for pelvic stabilization during ambulation and dynamic functional ac...

We investigated whether the effects of ankle foot orthoses (AFOs) and AFO-tuning using incremented heel height is comparable between overground and treadmill walking in healthy adults. Results of this study indicate that small but consistent differences between treadmill and overground walking exist...

This study’s objective was to compare lower extremity joint coordination between high-calibre (HC) and low-calibre (LC) ice hockey players during forward stride skating. A 10-camera Vicon motion capture system collected kinematic data on 8 HC and 8 LC players. Continuous relative phase (CRP) was c...

The magnitude of hip impact force during a fall on the ground (i.e., concrete surface) from standing height was determined. We found that this force decreases up to 36%, depending on how they land on the ground.

This study examined the effect of varying step frequency on joint moments during walking and running in four healthy young runners using an instrumented three-dimensional (3D) gait analysis. Overall, the results suggest that faster step frequencies, as adopted by older individuals, result in greater...

External transducers have the potential to serve as practical surrogates for bone load estimates both in and outside the lab. This study examined the relationship between modelled tibia stress estimates during running using subject-specific tibial geometry with ground reaction force (GRF) and tibial...