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A multiscale model of the lumbar spine was developed to characterize the link between whole-body and tissue-level biomechanics for people with and without a transtibial amputation during sit-to-stand. Lumbar spine kinematics predicted trends in tissue loads well for annulus fibrosis stress vs. flexi...
Exoskeletons can augment the capacity of humans and enhance mobility in the disabled. Often it is required to understand how varied levels of assistance affect the metabolic cost. Experimental studies investigated the effect of varied assistance on metabolic cost for different exoskeletons . Simulat...
The aim of this study was to quantify the test-retest reliability of crank-level variables during maximal cycling. Fourteen track sprint cyclists performed 3 x 4 s seated sprints at 135rpm on an isokinetic ergometer, repeating the session 7.6 ± 2.5 days later. Crank-level variables demonstrated exc...
Anterior cruciate ligament (ACL) injury has been shown to compromise joint position sense (JPS) in the knee, which is necessary for controlling joint positioning and movement. This study showed that mechanical noise vibration (MNV) improved JPS in the ACL reconstructed (ACLR) patients at 6 months af...
National arthroplasty registries around the world have an increasingly important role in monitoring population-based quality outcomes in total hip and knee arthroplasty since the first registry was started in 1979. The registries combined with design, material and surgical improvements have led to s...
Two ambulatory individuals with incomplete spinal cord injury (iSCI) received two months of gait training performed in a movement amplification environment. Specifically, during treadmill walking a cable robot applied a continuous lateral force to the pelvis proportional in magnitude and in the same...
It is currently unclear whether shear wave velocity (SWV) is able to predict changes in muscle stiffness independent of changes in stress, as these covary in muscle and SWV is known to depend on both stress and the material properties of a tissue. Our unique animal model allowed us to match ultrasou...
Gymball - a portable and compact gyroscopic device was developed for hand rehabilitation. This pilot study validated the device’s design and assessed the prospect of using it for therapy. Specifically, the study focused on whether: (i) the gyroscopic torque, generated by the device, can passively ...
This study investigated the relationship between muscle composition and patient-reported pain in individuals with and without symptomatic or radiographic hip osteoarthritis (OA). Fatty infiltration of the hip abductor muscles was quantified and related to HOOS pain scores. Increased fatty infiltrati...
Sustained postero-lateral glide at the glenohumeral joint is a manual therapy technique used for treating patients with shoulder pain. The aim of this study was to assess the effect of sustained glide on scapular muscle activity ratio. We used surface electromyography to monitor activity of three sc...
Traditional static optimization, which minimizes muscle activations squared, may not accurately estimate muscle activity in pathological populations that have abnormal muscle co-activation. A Matlab-OpenSim interface was created to develop and test objective functions that included a muscle co-activ...
Gait analysis is commonly used to assess differences in walking between groups of adults or to evaluate changes in adults. In order to determine true differences between groups or time points, reliability and minimum detectable differences (MDD) are needed. This study evaluated within-day and betwee...
Low back pain (LBP) remains a critical issue in primary care. Currently, clinical practitioners rely on subjective measures/questionnaires to categorize LBP patients to pursue specific treatment regimens. However, the need for new objective scales to assess the level of patients’ prognosis risk is...
We investigated the effects of obesity on musculoskeletal pain at various regions of the upper torso, and shoulder range of motion (RoM) in community-based women. Obese women displayed increased musculoskeletal pain in the shoulders and arms, as well decreased shoulder RoM compared to their leaner c...
This study examined the viability of replacing traditional cross cutting techniques in a laboratory due to the difficulties of capturing high-intensity, “natural” cross cuts. Range of motion and peak moments about the knee were recorded for three tasks: traditional cross cutting, jump cutting, a...
In human gait, the ankle is commonly modelled as a linear rotational spring that stores and returns energy throughout stance. However, this model ignores the higher-order damping effects of the physiological ankle joint. More accurate characterizations of these nonlinear phenomena may help optimize ...
This study implemented a muscle synergy extrapolation method to estimate the fewest number of lower limb muscle activation patterns required to characterize walking in children with cerebral palsy (CP). Muscle activation data from a child with CP and a typically developing (TD) child were used. Find...
With great interest to the sports world, impressive performances in Athletics have drawn an interest in the gathering of kinematic data on the performances of the world’s elite competitors. This study serves as the platform in presenting biomechanical performance analysis in Athletics at the colle...
Return to sport testing is commonly used to assess the strength and function of athletes post anterior cruciate ligament reconstruction (ACLR). It is understood that kinematic asymmetries may predispose an athlete to poorer function or reinjury risk. The current study showed minimal interlimb differ...
The physical stress of clinical practice is an occupational risk factor for developing musculoskeletal disorders (MSDs) in dental hygienists. The utilization of dental magnification loupes shows promise in allowing the practitioner to maintain a neutral posture, enhancing quality of care and a reduc...
This paper presents a novel ergonomic design for the 1st metatarsophalangeal joint (1st MTPJ) stiffness measurement system. Although several studies focused on the experimental measurement of the 1st MTPJ range of motion, little attention has been given to the design of the measurement device. Based...
The purpose of this study was to clarify the BLD of spring-like behaviour in hopping at various frequencies and the effect of chronic adaptation via sprint running experience on BLD during the hopping. Fifteen male experienced sprinters and 12 male novices participated in this study. Participants we...
This study explored whether player position in baseball influenced countermovement jumping strategies and their resultant force-time profiles. Subjects performed a series of three countermovement jumps on a force platform. Eccentric rate of force development (RFD), peak concentric force, countermove...
The purpose of this study was to analyze the effect of potential fallers on fall analysis. 79 elderly people aged 60 years or older were participated in this experiment. Subjects were divided into four groups (GROUP1: non-faller - non-faller n = 46, GROUP2: non-faller - faller n = 12, GROUP3: faller...
Unicompartmental knee arthroplasty (UKA) replaces the damaged compartment of the osteoarthritic knee with less tissue damage and presumably better restoration of the kinematics compared to total knee arthroplasty (TKA). However, the outcome depends heavily on the accurate restoration of the mechanic...
Multitasking represents a common activity in sports, but it is unknown whether domain-specific cognitive ability can predict the effect of these scenarios on knee mechanics. The relationships between baseline cognitive ability and knee mechanics were characterized during a drop-jump landing task und...
Statistical parametric mapping (SPM) has been used to analyse biomechanical data including force, kinematic and EMG trajectories, but common SPM software implementations require 20 ms for probability calculations, which may be too slow for real-time applications. This study aimed to improve the effi...
The relationship between running economy and technique was explored using principal component analysis (PCA). Runners with good economy exhibit less extreme pelvis movement, reduced knee flexion mid-stance and during swing but greater knee flexion pre-landing
The aim of this study was to clarify the effect of wearing a forearm prosthesis on starting block performance in sprint running. One female unilateral below-elbow amputee athlete, a T47 400m medalist in the 2016 Paralympic Games, performed three 10m sprints from starting blocks either wearing a fore...
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...
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