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The influence of orthotics on the kinematics of the trapeziometacarpal (TMC) and scaphotrapeziotrapezoidal (STT) joints during thumb and wrist movement were measured in healthy volunteers using a CT-based approach. Comparison of different types of orthoses show that prefabricated orthoses immobilize...
Cognitive load associated with dual-tasking while walking is known to affect balance and increase fall risk. The objective of this study was to quantify the effect of cell phone usage on head stability during walking.
The purpose of the study was to examine the influence of footwear on loading rate and joint kinematics during walking. Nineteen healthy females walked on an instrumented treadmill at 1.3 m/s. Ten strides (10-right, 10-left) were analyzed for two walking conditions (shod, unshod). Loading rate and jo...
Upper limb kinematics may reflect the higher rate of rotator cuff injuries in breast cancer survivors (BCS) after treatment. Motion of BCS and controls was evaluated during functional tasks (FTs). BCS with impingement pain demonstrated lower scapular upward rotation, humeral abduction, and humeral i...
This work examined the performance of a hand-tracking task prior-to and following either wrist flexor or extensor isometric fatigue. Wrist extension and flexion force decreased equally following fatigue. Tracking error was significantly greater immediately following fatigue compared with baseline, b...
Soft tissue artefacts (STA) between markers and bones introduces errors in the calculation of foot kinematics. The aim of this study was to quantify STA of markers on the foot and their effect on the calculated foot kinematics according to the Oxford Foot Model (OFM) and Rizzoli Foot Model (RFM). Pa...
We investigated the effect of movement speed and load on motor unit firing behaviour during repeated flexion/extension contractions of the Biceps Brachii. At all speeds and loads, greater motor unit firing rates were observed during the concentric vs. eccentric phases of the movement. However, diffe...
The geometry of the talus bone is important to implant design, talar disorders. Our recent work has shown that the talus bone has the same shape among individuals and thus a template with different sizes can be used as a replacement. The current study aims to find the shape of the template based on ...
An angle-driven computer simulation model of aerial movement was used to determine the maximum amount of twist that can be produced in a reverse 1½ somersault dive from a three-metre springboard using aerial and contact twisting techniques. A limiting dive was identified as that producing the large...
Rotator cuff disease is a common cause of pain and dysfunction. Understanding the mechanism of rotator cuff injury is required for prevention and effective treatment. The effect of kinematics on rotator cuff pathology is not well understood — finite element modeling may be used to understand the m...
Forward propulsion, a key contributor to walking speed and walking adaptability, is mainly generated by the ankle plantarflexors. Our prior research showed that walking with a solid AFO hindered forward propulsion generation and overall mobility in healthy adults. However, this has not been examined...
Repetitive overhead work remains a potent risk factor for development of musculoskeletal shoulder disorders. This study evaluated how subjective and objective measures of shoulder performance, and indicators of muscle fatigue, varied as a function of exertion height during a complex hand force exert...
Individuals with lower limb malalignments may utilize differing movement strategies that are protective of their knees. To test this idea, total support moment distributions were compared between healthy individuals with and without genu valgum malalignment during single-limb forward and lateral dro...
Examining how different kinds of in-game special visual effects influence the performance of music game players. According to the results, the brightness of effects influenced more than the size of effects, and the influence could be reduced by promoting proficiency.
Individuals with lower limb amputation often develop overuse injuries and osteoarthritis in the intact knee. Unfortunately, how prosthetic foot stiffness and load carriage technique influences intact knee joint loading during amputee gait is not well understood. This study found that during unloaded...
Shoes influence the movement of the foot and lower extremity during running. Stiffer shoes enhance running economy and both the metatarsophalangeal joint and the ankle joint mechanics are suggested as possible pathways for this improvement. However, stiffer shoes will also influence the midfoot kine...
This study demonstrated that increasing cognitive load and inducing lower extremity muscular fatigue increases muscle activity despite the standing surface. Softening the shoe-surface interface does not seem to be an adequate means of reducing muscular exertion after a fatiguing workload, especially...
The muscles operating closest to their functional limits produce the “weak link” for locomotor ability. This study shows that both young and old adults operate at a much greater relative effort at their ankle plantarflexor than knee extensor muscles during walking and running. This suggests that...
This study is seminal in providing long-term functional outcome evaluations of single-event multilevel surgery (SEMLS) in children with cerebral palsy (CwCP, specifically bilaterally spastic CP). It presents a novel multidimensional representation demonstrating that all sagittal joint angles, on bot...
Prospective authors are invited to submit manuscripts reporting original unpublished research and recent developments in the topics related to the conference. It is required that the manuscript follows the standard IEEE camera-ready format (IEEE standard format, double column, 10-point font). Submis...
In response to musculoskeletal injury risk consequences of shifting global body composition demographics, this study explored relationships between body composition and strength. Negative correlations between strength normalized by body weight and body composition suggest current assumptions may pro...
Diminished gluteus maximus activation in persons with femoroacetabular impingement syndrome (FAIS) has been proposed to contribute to symptomatic impingement. The purpose of this pilot project was to investigate if targeted gluteus maximus activation influences transverse plane hip kinematics and ki...
Obesity is a risk factor for the development of knee osteoarthritis. While numerous studies have hypothesized that the primary pathological stimulus is increased joint loading resulting from elevated body mass, there are limited data on the effects of obesity on local in vivo strain distributions in...
High-speed biplanar videoradiography (HSBV) enables new insights on the in-vivo dynamic motions of the pathological spine. Variations in the defined segment specific anatomical coordinate systems (ACS) likely influence repeatability of vertebral kinematics. This study investigated the effects of rep...
NBD expanded internationally from the US to 16 countries in 3 years to increase Biomechanics’ societal impact. Here we describe our rapid growth through the events in 5 nations for the purpose of showing others how they can participate in this worldwide celebration of Biomechanics.
Gait deviations seem persistent after total knee arthroplasty (TKA). The gait of TKA patients and asymptomatic controls are commonly compared at their comfortable walking speed (CWS). We aim to identify deviating gait biomechanics of TKA patients that are not contaminated by differences in gait spee...
Our goal was to estimate the lower limit on the net metabolic cost of transport (MCoT) in human walking. We found the muscle forces of a musculoskeletal model that minimized the total positive muscle fibre work, under the constraint that the net joint torques were equal to those obtained from experi...
Sexual minority youth are at increased risk for mental health problems and substance use, and accumulating evidence indicates that bisexual youth are at greatest risk. However, bisexual youth are not a homogenous group and scholars have called for greater attention to the intersections of multiple m...
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