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The purpose of this study was to use foot pressure data, at the age of 2 years, to predict reoccurrence of deformity for children with unilateral clubfoot. Algorithms predicting overall presence of reoccurrence, repeat casting, repeat tenotomy, Achilles lengthening and tibialis anterior tendon trans...
Recent reports have suggested that high loading rates, typically associated with a rearfoot strike (RFS) pattern, during running may be related to overuse injuries. With the recent increase in wearable sensors it is important to identify paradigms where footstrike pattern (FSP) can be detected from ...
Performance footwear is a system of design attributes tuned to deliver an athlete benefit. With strategically constructed samples, attributes can be investigated for their influence on biomechanical, energetic, physiological, and/or perceptual factors. In this talk, I will take you through our footw...
Due to the anatomical structure of Achilles tendon, it has been hypothesized that muscle force imbalance within the triceps surae (TS) muscle group may play a role in the development of Achilles tendinopathy. The aim of this study was to determine if the sharing of force production within the TS dif...
The potential influence of hip muscle activity on the control of postural sway is often overlooked. To explore this, we used the NIH toolbox test of standing balance as well as tests of force steadiness and maximal voluntary contraction torque for the ankle flexors and extensors and the hip abductor...
The purpose of this work was to evaluate changes in forearm muscle co-contraction caused by sudden wrist perturbations during a dynamic wrist tracking task using a haptic wrist robot. Surface electromyography was recorded from eight muscles of the upper-limb. Co-contraction ratios for all muscle pai...
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The objective of our study is to develop an XFEM model of cancellous bone specimen in 3D that is capable of accurately predicting the onset and propagation of cracks under mechanical loading. In order to do so, the micro-CT scan data of cancellous bone was converted into 3D geometry. Material proper...
Animal musculoskeletal models have great potential to inform human biomechanical modelling methodology. Here, fully subject-specific human lower limb models were created using similar methods to those previously used to generate a mouse hindlimb musculoskeletal model. The merits of both models and t...
ACL reconstructions aim to restore knee joint stability and decrease knee joint laxity. However, laxity in the frontal plane is not often studied during gait. Twenty-four young adults, twelve who had an ACL reconstruction, and twelve controls, were recruited to perform a maximum of ten gait trials e...
The longitudinal changes in foot pressure asymmetry for n=30 children with unilateral clubfoot was measured. Asymmetry for foot size and contact area were measured. Asymmetry between the unaffected and affected sides increased in all parameters. Significant increases in asymmetry were seen for the f...
Changes in sagittal knee moments and patellofemoral contact force have been linked to the risk of patellofemoral pain(PFP). Previous studies proved that there were different loading patterns of knee joint with different foot strike patterns and surface cushioning conditions. Currently, few studies d...
Several biomechanical variables have been linked to running economy, in addition to extrinsic factors such as footwear. Experienced runners performed treadmill running on separate days and in different footwear: minimal, neutral cushion, and highly cushioned. Running kinematics and running economy (...
The aim of this study was to investigate force loss in isometric contractions and during active stretch, following muscle damage, and thus gain insight into the role of the active and passive force components on muscle damage and active stretch contractions. Skinned muscle fibres were repeatedly (4 ...
Three-dimensional (3D) finite element analysis (FEA) was used to quantify the forces transmitted in the anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) during non-resisted and resisted ankle internal/external rotation (NIER and RIER). Four healthy male subjects were recruited...
The custom of Bound foot among Chinese females had been practiced for over a thousand years, which was prohibited since early 20th century. This study recruited elderly Chinese females with bound feet and normal feet. Gait analysis were performed, and results from kinematics and plantar pressure tes...
This study analyzed the electromyography (EMG) activity of masseter and anterior temporalis muscles during chewing in 2 different posture conditions: natural head posture (NHP) and deliberate forward head posture (FHP) in healthy individuals; and to compare EMG activity between subjects based on the...
Ultimate frisbee players have a high rate of lower limb injury¶ such as ACL tears. We studied the prevalence of high-risk¶ cutting maneuvers in women’s collegiate ultimate players¶ during competition using lower-body wearable motion¶ sensors. Cutting frequency ranged from to 19 cuts per point....
Evaluating what biomechanical changes influence the incidence of low back pain (LBP) in servicemembers with an amputation is a multifactorial issue. The goal of this study was to examine the biomechanical contributions in patients that self-report LBP and compare to patients with amputation who do n...
A medializing calcaneal osteotomy (MCO) is frequently performed to correct adult-aquired flatfoot deformities, but a lack in reliable 3D data associated to clinical/surgical parameters still exists. This study was aimed at reconstructing relevant 3D surgical parameters using a Cone-Beam CT (CBCT) in...
The aim of this study was to identify homogeneous subgroups of running gait patterns in asymptomatic subjects using 3-D kinematic data from the foot-ankle complex. Seventy-three healthy long-distance recreational runners were assessed for 3-D running kinematics. A Hierarchical Cluster Analysis was a...
Today's midsole materials combine increased compliance with high resilience and reduce the metabolic cost of running substantially. By how much can these reported metabolic savings improve distance running performance?
The purpose of this study was to quantitatively measure the strain induced upon the bone by an electrically induced contraction of the muscles in order to analyse the potential of using Functional Electrical Stimulation (FES) as a method for targeted osetogenesis. With the force output of a joint du...
Muscle fibres consume metabolic energy to deliver force and do mechanical work. Less well characterized is a separate metabolic cost for cyclic force production, that is not included in current models for metabolic cost. We therefore characterized the metabolic cost for cyclic muscle force, hypothes...
The aim of this study is to determine the forearm muscle activity and fatigue depending on the type of mouse during a long-term computer mouse task. Musculoskeletal disorders can be caused by persistent muscle load when working with computer mouse in a non-neutral posture of forearm. Although a vert...
Despite the generally accepted importance of form & force closure mechanisms in sacroiliac joint (SIJ) biomechanics, very little is known about SIJ form and orientation, and the relationship between both. This study describes the sagittal orientation of the SIJ relative to gravity, and defines its c...
Forward positioned head mounted technologies are becoming increasingly prevalent. This study assessed the effect of added forward positioned mass on upper neck extensor (UNE) and sternocleidomastoid (SCM) activity during reciprocal scanning. Results showed that UNE activity significantly increased w...
Aging is on the verge of a new era. Humans are approaching old age in unprecedented numbers. Increases in the prevalence of age-related diseases, frailty, and disability are visible signs of this historic demographic shift affecting the incidence and prevalence of osteoporotic fractures. Therefore, ...
Multiple linear regressions were conducted to determine which kinematic and temporospatial variables best predict reduction in knee abduction moment (KAM) during gait modification (GM). Only varus knee angle and stride width predicted KAM reduction in GMs. These results demonstrate that factors asid...
It is very important to clarify the differences in full body joint kinematics between elite endurance runners (elite runners) and novice runners for developing gait retraining regimes. This study collected motion capture data of runners and performed principal component analysis (PCA) for the data. ...
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