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Resistance training (RT) can determine changes in muscle and tendon mechanical properties that can now be evaluated properly with Supersonic Shearwave Imaging (SSI). The aim of the present study was to investigate the chronic effect of 8-week RT on Vastus Lateralis (VL) and patellar tendon (PT) mech...
Peripheral quantitative computed tomography (pQCT) can be used to assess the structural and geometrical changes in bone whilst exposing participants to minimal radiation. Structural parameters are analysed automatically, but geometrical measures are not. pQCT images were converted into binary before...
When computing ankle joint complex power using inverse dynamics, should you cut holes in the shoes to allow for skin-mounted motion tracking markers? And how important is consistency in marker location on the foot? We addressed these two important questions in walking and running. Our results sugges...
The purpose of this study was to investigate the effects of altered talus alignments on ankle joint contact forces (AJF) during vertical hopping. Motion capture and ground reaction force data were collected as ten participants hopped at 2.4 Hz. Various cases of anterior translation and medial rotati...
A systematic review investigating the association between jump-landing mechanics and patellar tendinopathy (PT) was conducted across five electronic databases. Statistically significant variables were identified in 12 studies across five participant cohorts and nine different jump-landing tasks. Cli...
Plantar fascia shear modulus was assessed in healthy participants, participants with plantar fasciitis and active pain, and participants with a history of plantar fasciitis, but no current pain. Plantar fascia stiffness was lower in the symptomatic group than either the healthy or asymptomatic group...
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...
Strain is an important mechanical stimulus for adaptation of¶ biological tissues such as tendons. Triathletes frequently¶ suffer from chronic tendon injuries [1], but investigations on¶ tissue strain are lacking for this population. We investigated¶ triceps surae tendon strain in triathletes dur...
To investigate lower limb movement differences on Warrior I pose between professional and novice for the best performance motion in Yoga. Five professional female Yoga instructors and five novice female were selected as subjects. The force plates and motion capture system were used to acquire the ki...
Motor control complexity is reduced in individuals with cerebral palsy. However, it is unclear whether the observed reduction is a product of the primary neurologic injury or an outcome from a pathologic gait pattern. In this study, motor control complexity was evaluated for typically-developing (TD...
Physics-based modeling and dynamic simulation of human eye movements has significant implications for improving our understanding of the oculomotor system. An open-source model of the human eye that can be used for kinematics and dynamics analysis is introduced. This model relies on the passive pull...
A new variable stiffness torsion adapter for a lower limb prosthesis was developed to reduce soft tissue shear stress in the residual limb by reducing transverse plane stiffness during activities of daily living. However, direct measures of shear stress are challenging due to the inability to optica...
Ankle impedance plays a critical role in how we interact with our environment. Understanding the mechanisms underlying these interactions is especially important when joint function is impaired. Ankle impedance is proportional to ankle torque and muscle activation during postural control tasks; howe...
Gait asymmetry is detrimental as it alters knee stability. To better understand how gait asymmetry affects knee stability fifteen healthy individuals performed an asymmetric walking protocol. Autoregressive (AR) modelling was employed to quantitatively and graphically delineate differences in peak s...
Previous research has suggested that several critical features are associated with the ability of surfers to successfully land two aerial variations, the Frontside Air (FA) and Frontside Air Reverse (FAR). We aimed to investigate whether surf-like simulated aerial landings replicated the key critica...
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...
Patellofemoral joint stress (PFJS) was used to quantitatively assess the biomechanic characteristics of the patellofemoral joint of older adults when descending the stairs. Compared with young adults, older adults had lower knee moment in the sagittal plane, quadriceps strength, and PFJS, which may ...
Several fundamental differences in shooting posture and biomechanics were identified between expert and novice marksmen. The findings provide a foundation to begin modifying training interventions which may help accelerate performance optimization for marksmen.
Definition of reference frames for the bones articulating at the ankle joint, that can be identified with high accuracy and repeatability, is essential for many biomechanical and clinical applications. Marker-inspired reference frames, representing the majority of exiting reference frame systems pro...
Trochlear dysplasia (TD) and medial patellofemoral ligament (MPFL) rupture are major factors in patellofemoral instability. We studied the effect of TD and MPFL rupture on PF contact pressure and kinematics in a cadaver-specific musculoskeletal knee model during a simulated non-weight-bearing knee e...
A comparative computational probabilistic analysis assessed influences of evolutionarily important musculoskeletal features on rotator cuff function for human and chimpanzee glenohumeral joints. Species-specific distinctions emphasized differences in primary shoulder function and provide novel conte...
Unilateral transtibial amputees have an altered walking gait including asymmetry between the intact limb and the prosthetic limb. Here we show that ankle taping on non-amputees induces left-right asymmetries in anterior/posterior ground reaction forces during walking similar to those seen in individ...
The purpose of this research was to identify baseline strength measures that may be predictive of resistance to fatigue during an extended load-bearing military march. Step-wise regression models accounted for 30 - 46% of the variability in how pace, step length, and stance time changed with fatigue...
Assessing landings is of importance in many sports, due to the relevance of being able to attenuate force efficiently. This project investigated whether a simple spring and damper element model can be used to model a drop and stick landing task. Landing data collected from 13 surfing athletes were f...
The purpose of the current study was to investigate the association between upper body joint motions and propulsive efficiency in pediatric manual wheelchair users. The results highlight the role of wrist motion in the optimization of the force applied to the pushrim during manual wheelchair propuls...
The purpose of this ongoing study is to assess back extension endurance time and muscle fatigue of university students with and without history of low back pain (LBP). To date, 11 graduate students (5 with and 6 without LBP) have participated, and the final sample will be 30 (15/group). The electrom...
The number of head injuries in soccer increases every year, but only few studies have been carried out directly on the field. The restricted data limit the understanding of the risk of head injuries. Thus, the purpose of this research project was to identify head kinematics of specific head impacts ...
A feature selection method has been developed to characterize individual performance of locomotor activities of daily living. The method has been applied to angular and inertial data recorded with a novel 3D printed wearable device. Feature selection optimization through systematic removal of featur...
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