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The energetic cost of transport for running decreases directly with gravity level, while walking cost is only modestly affected [1]. Speed has the opposite effect: increasing walking speed results in increased cost of transport while that of running is relatively insensitive (power increases but cos...
The use of walking boots (WB) is one of the most common treatments for diverse foot and ankle injuries such as sprains of Grade II or higher, pressure ulcers, and/or plantar fascia release. WBs have been shown to be beneficial for injury recovery, however, it is important to alert users of the subse...
We aim to develop a more reliable paradigm in which to measure cortical voluntary activation (cVA) in nonimpaired and patient populations. Modulation of joint angle and paired pulse transcranial magnetic stimulation (ppTMS) were examined as means of improving the measurement of cVA due to their abil...
Osseointegrated prostheses for individuals with lower limb amputation are an alternative to socket-based prostheses that mitigate the residual limb pain and discomfort at the socket stump interface during walking. In transfemoral amputees, propulsion is primarily generated by the prosthesis, with co...
Asymmetry indices provide insights into walking mechanics in populations with unilateral deficiencies. The number of strides used in specific studies varies, and often there are equivocal outcomes for symmetry reported in the literature. Thus, it is worth understanding the influence of the number of...
This study examined the effect of inter-cycle loading variation on cumulative tolerance in isolated spinal units. An in vitro paradigm was used to compare custom sinusoidal waveforms (i.e., consistent vs. variable amplitude) constructed with control between specimens for an equal average peak amplit...
The present study evaluates the 3D angle between the joint moment and the joint angular velocity vectors and investigates if the ankle, Chopart and Lisfranc joints are predominantly driven or stabilized during gait. The 3D angle curves show that the three joints adapt a stabilization-resistance conf...
Trunk movements and centre of body mass at the start of gait with 15% of young male subject’s body weights placed in a backpack upper and lower locations on the back were explored using a 3D motion analyser with force plates and EMG for the trunk and lower limbs. The lateral flexion range of the t...
The study presents the preliminary result of a semi-qualitative analysis of lower limb joint angle coordination during gait in a lower limb amputee’s population. The aim of this study is to evaluate and compare the kinematic joint coordination between LLA and healthy individuals (and their possibl...
In order to successfully complete a drop snatch squat exercise, athletes must move their body quickly in order to get under the barbell at the appropriate time. This high velocity motion requires the performer to exert large forces. However, athletes must also position themselves accurately in order...
In this study we compare common neuromechanical proxies for effort to the metabolic cost of reaching. We present a biomechanically accurate neuromuscular model of the arm, developed to estimate effort costs through measured metabolic cost in eight subjects making arm reaching movements. Neural drive...
Bones’ structure and strength are highly regulated in response to local bone strains, caused by muscle and inertial loading during movement. In order to examine the osteogenic stimulus provided by different habitual activities and exercises we measured human tibia deformation in vivo using motion ...
The purpose of this study is to examine the relationship between ankle plantarflexion angle at initial contact (IC) and knee valgus angle and moment during single-leg landing. Twenty-two adults performed single-leg landings from a 0.3-m height. The ankle angle at IC was negatively correlated with pe...
The findings from recent investigations have alluded to a greater reliance on visual information and processing in individuals following anterior cruciate ligament reconstruction (ACLR) during motor tasks involving the knee. The objective of this study was to determine how manipulation of visual inf...
Abnormal foot valgus is typical symptom of foot deformity. An accurate assessment of valgus degree is critical for the diagnosis and therapy design. However, the influence of walking stride frequency on foot valgus remains unclear. This study aims to characterize the valgus degree with the dynamic v...
The internal foot power and work during the takeoff phase of the standing long jump were calculated using distal foot power and foot power imbalance techniques. The foot power profiles were very similar for the two methods with a period of power absorption followed by a period of power generation ri...
We investigated the use of shear wave tensiometry to detect modulation of Achilles tendon loading induced via exosuit assistance. Tendon shear wave speed, and hence tendon loading, exhibited systematic variations with walking speed, load carriage, and the timing of active ankle exosuit assistance.
Individuals with anterior cruciate ligament reconstruction (ACLR) exhibit asymmetry in a variety of tasks. The use of quadriceps strength symmetry as a rehabilitation guideline may not reflect biomechanical asymmetry in other tasks.
In the aerobics, bouncing is a basic and essential movement for superior competition performance. Aerobic gymnastics in competition are required bouncing and jumping under rhythm restriction in music. It is so important to clear how athletes operate their limbs smoothly and effectively under limited...
Obesity reduces agonist EMG activity during single joint exercises, but the effects of obesity on EMG activity during dynamic activities of daily living are largely unknown. To examine how obesity affects EMG activity during sit-to-stand (STS), an essential daily living task, we measured EMG activit...
In this paper, we present a novel smart wearable and wireless body-fixed inertial sensor (i-Sens) based design for estimation of joint kinematics in the sagittal plane. Preliminary testing has been done on normal volunteers with this bodyworn i-Sens sensors kept at knee and hip level on one side. Th...
Recent experimental studies of human walking have shown that within an individual step the pelvis (CoM) state can be used to predict the next foot placement. Here, we used a simple open-loop-stable 2D walking model to show that one cannot take this predictive ability, by itself, as evidence of activ...
Older adults (OA) have challenges regulating stability during gait. This work sought to understand how aging influences anterior-posterior stability (AP), by examining ground reaction force (GRF) eccentricity generated by each limb. 28 younger-adults (YA)(18-31 years) and 28 OA(>65 years) completed ...
Occupations with regular exposure to squatting have a greater risk of developing knee osteoarthritis. To determine the effects of squatting exposures on subsequent knee power generation and concurrent muscle oxygenation, participants completed cyclic and sustained squatting exposures, with countermo...
The ability to change heading direction while walking is an important component of everyday mobility. During turning the movement of the body’s centre of mass must be redirected towards the new walking direction. The aim of this study is to experimentally test the proposition that turning is contr...
Age-related changes to neck strength may contribute to fall-related traumatic brain injuries (TBIs). However, there is limited knowledge on reliable neck strength measuring devices in older adults. This study found a novel neck strength device had excellent intra-rater reliability when testing young...
This study examines data collected using an infrared passive marker-based motion capture system and an inertial measurement unit motion capture system and assesses whether the data is comparable across systems. Sensors from both systems were placed on the subjects and data was collected simultaneous...
Animals easily navigate complex terrain and can rapidly and safely reject unexpected perturbations. However, the underlying mechanism at the muscle-tendon level of this behaviour is unclear. To study this, we attached a real muscle-tendon unit to a novel bio-robotic interface that emulates interacti...
Inertial measurement units (IMUs) are often used for research purposes in a variety of fields. The aim of this work is to show how these sensors function in line with the basics of rigid body kinematics. Preliminary results of two sensors on the same body demonstrate the sensitivity of acceleration ...
Knee kinetics using participant-specific body segment masses (BSMs) have not been predicted for cycling (C) and elliptical training (E). In this study, participants underwent gait (G), C, and E motion analysis experiments. Kinetics were computed with mass ratios scaled from total body mass (scaled I...
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