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Pressure-based auditory feedback training (PBFT) from a clinically-appropriate wireless shoe insole was employed to facilitate the skill acquisition for subjects with medial knee osteoarthritis (OA). The goal of the PBFT was for subjects to learn a gait modification that targets knee load distributi...
Principal Component Analysis (PCA) is a technique for feature extraction which identify strong patterns in a dataset and emphasize data variation. PCA can be used to characterise bone shape variations in tibia, fibula and femur on a paediatric population. PCA was performed on 64 femurs and 67 tibia/...
We used uphill walking to test whether lower-extremity joints, and the major muscle groups spanning them, could alter their mechanical functions. We found that the hip, ankle, and knee decreased spring- and damper-like behavior and increased motor-like behavior during uphill walking. These joint-lev...
A musculoskeletal model that incorporates backpack attachments at the torso and pelvis was developed to evaluate load carriage effects during walking in military service members wearing backpacks with/without a hip-belt. Compressive L4-L5 and axial hip joint contact forces were not significantly dif...
Head impact monitors can track athlete impacts and estimate their spatial and temporal aspects. And to monitor athletes in real-time, a monitoring system must report data accurately and precisely, and avoid reporting too many spurious, false events. For decades this has proven very labor intensive a...
The functional design of skeletal muscle is shaped by conflicting selective pressures between support and propulsion.This study uses a custom-built OpenSim model of varanid lizards to understand how size-related changes are reflected in changes in joint moments at the knee and ankle.
154 people with chronic low back pain (CLBP) were recruited for a baseline data collection, as a part of a randomized, controlled clinical trial. All participants completed the Numeric Pain Rating Scale (NRS), modified Oswestry Disability Questionnaire (MODQ), clinical tests of maximum flexed and ex...
We show that, following adaptation to split-belt walking, margin of stability of the slow and fast legs separately converge to their respective speed-matched margin of stability values in normal treadmill walking. The predicable steady-state margin of stability values in split-belt treadmill walking...
To improve the methods used to compare density-modulus relationships and material mapping strategies, this study used experimental loading of scapulae within a micro-CT. Experimental boundary conditions (BCs) were replicated in QCT-FEMs using digital volume correlation (DVC), and DVC was used to com...
Sprinting plays an important role in many different Olympic sports, including field hockey. Better insights in how sprint performance is determined and evolves during the season is important to improve training protocols. The aim of this study was to investigate changes in the sprint performance of ...
Surface EMGs were recorded from two muscles of the dominant lower leg during vibratory stimulation at different frequencies, while participants kept two postures on a vibrating platform. Ten vibratory sessions, combining various frequencies and postures were administered in a randomised order. RMS v...
3D gait analysis provides insight into the lower limb biomechanics of knee osteoarthritis. We hypothesized that stressing the locomotor system through walking on an incline would amplify biomechanical differences in gait between participants with osteoarthritis and asymptomatic controls. Nineteen pa...
Lower extremity joints illustrate torsional spring-like behaviour during running. While the influence of running speed and different strike patterns on joint quasi-stiffness have been investigated, the changes associated with graded running are not known. Ankle and knee joint stiffness of twelve rea...
Strawberry pickers may be at high risk of low back disorders (LBDs) due to sustained lumbar flexion during bent posture. The aims of this study were to conduct motion analysis experiments of simulated harvesting movements and inverse dynamic analyses of lumbar spine loads. Results indicate higher L5...
MRI allows non-invasive, quantitative assessment of ACL healing in vivo. Previously, a linear model employing MRI T2* relaxometry has been shown to predict structural properties of the ACL post ACL-repair (ACLR). This study shows that a machine learning model using common MRI features can achieve st...
The removal of gender restriction in combat-centric roles will increase female soldier exposure to regular heavy load carriage. Physiological sex differences place women at a disadvantage for these physically demanding roles. Identifying sex-specific responses during a standardised load carriage tas...
We used a markerless Deep Learning-based method to perform 2D kinematic analysis of deepwater running. Twenty-one volunteers performed deepwater running while a GoPro camera recorded sagittal plane lower limb motion. A deep neural network was trained to predict the locations of lower limb landmarks....
Disuse induced by botulinum toxin indicates that tendon remodeling during growth is different from that in skeletally mature animals.
Findings from the present study suggest that moderately graded running can increase caloric expenditure without increasing cumulative patellofemoral joint loading compared to slow level ground running. Given that burning calories is the primary goal for many recreational runners, this suggests that ...
Prediction of uneven terrain through motor intent pattern recognition has potential for real-time lower-limb prosthesis control to improve amputee balance. Subject-specific pattern recognition algorithms based on residual limb muscular and inertial sensors predicted an uneven step with greater than ...
This paper presents a novel way of quantifying lower limb symmetry using a non-linear dynamics approach. Two distinct phases in inter-leg dynamics were observed for walking and running, separated by a clear phase transition. Lower determinism in the mutual phase space demonstrated that walking is mo...
Timing of peak muscle activity of the biceps femoris long head during stance phase of running was compared for people with a transtibial amputation using running-specific and daily-use prostheses. The amputated leg had earlier peak activity compared to the intact leg using both prostheses, suggestin...
Activities of daily living (ADL) often involve forward bending. Some of these tasks can be performed using a one-handed braced arm-to-thigh technique (BATT) to support the trunk on the thigh. Three common ADL (i.e. weeding, reaching for objects in low cupboards, and car egress) were simulated in the...
The objective of this research was to determine the in vivo measurement precision (reproducibility) of magnetic resonance (MR) based finite element (FE) modeling outcomes. MR images (1.5T) of the left proximal femur of 13 participants were used to construct FE models. Precision errors of the FE outc...
Nowadays, females commonly perform Military combat roles that were once exclusively performed by males. Given the strength differences between the sexes, it is important to understand if females adapt differently to physical training, which may necessitate sex-specific training programs. This study ...
To address the lack of sensation that accompanies limb loss, an increasing number of amputees are receiving a nerve transfer surgery, Targeted Reinnervation (TR). Touches at the surgery site can feel as though they originate in the amputated (phantom) limb. However, sensory recovery after this surge...
When Chrome 92 releases on July 20th, the Chrome SharedArrayBuffer will only work with cross-origin isolated pages. This will affect any previously configured Web SDK clients. Therefore, you must reconfigure your web server settings and upgrade to the Web Meeting SDK version 1.9.5 if you want to con...
This Study compared leg, ankle, and knee stiffness during running between a maximal and traditional shoe before and after a 6-week acclimation period to maximal shoes. Leg stiffness was significantly higher in the maximal shoes, while ankle stiffness was significantly higher in the traditional shoe.
Contractility increased following both aerobic and resistance exercise training. Resistance training resulted in increases in maximum force and velocity, aerobic training led to greater increases in shortening velocity, while combination training resulted in increases in both maximal force and veloc...
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