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Low back pain is a disabling pathology to which several workers are exposed. Our study aimed at finding biomechanics driven biomarkers of incorrect lifting postures. For this reason two cohort of subjects were analysed (healthy and affected by low back pain) through plantar pressure, electromyograph...
This study compared stride, thorax, and pelvis kinematics between accurate and inaccurate forehand (FH) and backhand (BH) lawn bowl deliveries. Kinematics were assessed of 19 elite lawn bowls athletes completing FH and BH deliveries. No relevant differences where shown between accurate and inaccurat...
Abnormal coordination is associated with greater post-stroke impairment. However, it is unclear whether these coordination patterns emerge as a compensation to kinematic constraints such as increased muscle tone. In this work, we characterized the muscle coordination patterns in 14 healthy individua...
Purpose: The purpose of this study was to compare the differences in frequency, and location of head impact events per match between lightweight and heavyweight MMA fighters. Methods: 30 videos of professional MMA bouts were viewed to document all impacts to the head. Independent sample t-tests were...
A comparison of joint coordinate systems (JCS) of the wrist has been conducted to provide a more clinically applicable alternative to the International Society of Biomechanics recommendations. Changes in the hand coordinate frame affect measurements in the JCS more than the forearm frame. An alterna...
A majority of physical activities which experience impacts during ground contact generate soft tissue vibrations. Those vibrations could potentially cause injury and energy lost due to high muscle tone associated with the vibration. Study has been reported the energy used by the muscles when exposed...
We investigated role of biomechanical and neural constraints in the formation of the plantar covariation of hindlimb elevation angles during walking in the cat. Using experimental and computational methods we found evidence that neural spinal circuitry may be responsible for the planar covariation.
New wireless sensors are being developed to help estimate kinetic and spatiotemporal running characteristics, but the relationship between these variables and kinetic variables quantified from ground reaction force (GRF) data are not fully understood. RunScribe variables estimating shock, braking, i...
Full body musculoskeletal models are of great interest due to their ability to capture a more accurate representation of human motion. Over time, full body models have grown in detail, although more work must be done. In this work, previously validated OpenSim models are combined to create a more de...
Surgical robots capable of operating under magnetic resonance image(MRI) scanner may improve efficiency and safety of neurosurgery. In previous work, a five-axis MRI compatible robot was developed and validated MRI compatibility and safety of the prototype. The goals of this study are twofold: posit...
The Dresden technique preserves the paratenon during Achilles tendon (AT) repair and may improve the plantarflexor mechanism when combined with mobilization during early rehabilitation. However, the surgical repair design for AT ruptures can affect rates of re-rupture or lengthening. Therefore, we d...
Impact sound has been suggested to be an auditory feedback to modify footstrike pattern with an intention to reduce the vertical loading rates and injury risk in runners. However, the isolated effect of a change in footstrike pattern on the impact sound and vertical loading rates remains unclear. Th...
This study investigated the classification of muscle activation patterns (MAP) during normal walking and while performing a cognitive task using artificial neural networks. The MAPs were successfully classified (average classification rate = 92.2%), indicating a systematic difference between single ...
Understanding the biomechanics of spiking a volleyball may enable new techniques for prevention and rehabilitation of non-traumatic shoulder injuries particularly in adolescent volleyball players. This study compares shoulder kinematics data collected from high school volleyball players with previou...
Mechanical stimulus is one of the key factors that decide fate of chondrocytes in context of endochondral ossification. An osteochondral setup can be used to study the effect of mechanical stimulus on chondrocyte fate. In this paper, finite element models of the human knee joint and an osteochondral...
This study tested the concurrent validity of pose estimation from markerless motion capture against those collected using a marker-based technique. Kinematic data were recorded simultaneously while ten male participants walked over ground at their self-selected speed. Sagittal plane joint angles dem...
The present study has revealed that the kinetic chain of rearfoot pronation-supination and shank rotation contributes to lateral motion control of the knee during early stance. The subjects were 26 healthy adults. The kinematic chain ratio (conversion rate of shank rotation angle in relation to rear...
Dynamic stability of trunk movements can provide important information about spine control during movement tasks. The Pilates method focus to maintain trunk stability during exercises. The objective of this study was to compare trunk stability between two practitioner’s levels and two intensities ...
The relationship between patellar maltracking and instability is poorly understood. Patellar maltracking can be subjectively described, but it is difficult to objectively assess using clinical tests or traditional imaging techniques. Using personalised tibiofemoral (TFJ) and patellofemoral joint (PF...
This study utilized inertial sensors placed on bilateral thighs and bilateral shanks to examine the movement of the four individual segments of the lower limbs during gait in people with unilateral lower limb amputation (LLA). Differences were exhibited between groups based on having amputation at t...
The rate of force production (1/tc; tc is ground contact time) and volume of active muscle (Vm) account for 62% of the metabolic cost of running over a wide range of step frequencies. Additionally, 1/tc and Vm account for 48% of the metabolic cost of hopping at the same range of frequencies. Thus, 1...
Neck pain and discomfort are commonly reported among both civilian and military parachutists. Such pain and discomfort can limit an individual’s cervical spine range of motion (CROM). CROM is an important factor in performing typical daily tasks and when limited individuals may compensate by incre...
This study aims to determine the response of stroke survivors to user-driven treadmill control and functional electrical stimulation (FES) of their paretic ankle musculature. 14 stroke survivors walked at their self-selected (SS) and fast speeds on an instrumented treadmill in its fixed speed (FS) m...
This study aimed to determine the breakpoints in superficial electromyography (sEMG) signal during a maximal incremental skating test (IT) and compare them to the first (VT1) and second (VT2) ventilatory threshold. Ten well-trained long track speed skaters performed a maximal incremental skating tes...
Self-paced treadmills (SPT) that allow participants to self-select their preferred speed and naturally vary speed may better replicate the variability of overground (OG) running. This study assessed the validity of a SPT design in comparison to fixed-speed (FST) and OG running conditions. Four of th...
This simulation study examined the effect of the constrained center of mass (COM) trajectory on spatiotemporal organization of the via-angles, i.e., the via-posture of a kinematic chain, in order to explore the determinant of the joint coordination. A minimum-jerk criterion with via-point constraint...
Frontal-plane ankle motion is important for balance in walking, but is seldom controlled in robotic prostheses. This abstract describes the control and performance of a semi-active two degree of freedom robotic prosthetic ankle. The mechanism uses a nonbackdrivable cam wedge system based on rotating...
This study compared the performance of five artificial neural networks in evaluating surface electromyography (sEMG) signal quality. AlexNet demonstrated the highest accuracy (99.55%) with negligible false classifications, indicating that sEMG quality evaluation can be automated via an image recogni...
With the aim of early prediction of dementia, a body balance assessment system with integrated virtual reality (VR) has been developed and its construct validity was evaluated for the first time with 14 healthy older adults (OA). We measured their body sway speed in 22 different conditions, intentio...
Pitches made during a game are highly monitored and regulated in all levels of baseball with no attention made to any other throws, especially in the bullpen. Assumptions have been made that bullpen throws are not as stressful as in game pitches and do not need to be monitored; however, there are no...
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