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We introduce effective mass as the preferred alternative to total system mass when analyzing a multi-link model of the human body. Effective mass (EM) is defined as the mass that would have equivalent motion characteristics at the point of force application if substituted for the whole system. We de...
Interventions to prevent falls have been a major focus of research in recent years. We propose that older adults can improve performance in common clinical measures of balance by performing a lateral stepping training. Fourteen older adults aged 65+ underwent a six-week lateral stepping training 3-d...
Many investigations have been performed to understand the biomechanical relationship using biosignal. Surface EMG (sEMG) signal is particularly interesting part for human rehabilitation system in order to detect the gait intention and widely studied in the field of rehabilitation system. Intention d...
The transient response of postural control was investigated during quiet, eyes closed stance in young and elderly populations, as a first step in assessing the clinical relevance of this transient behavior. Time-dependent estimates of commonly used center of pressure parameters were analyzed through...
Decades of in vivo exogenous skeletal loading studies have identified numerous loading parameters associated with enhanced osteogenic responses while also revealing signalling pathways essential for mechanostransduction. However, the translation of these insights into effective exercise intervention...
Differences in ankle joint work between foot strike patterns may influence Triceps Surae (TS) muscle metabolic energy consumption and hence whole body metabolic energy consumption. Here, we used a dynamic optimization approach to estimate muscle forces, lengths and activations of 43 lower limb muscl...
Persons in symptom remission from recurrent low back pain (rLBP) and back-healthy persons performed a single-limb dynamic balance task with and without a concurrent mental math task. Thorax and pelvis frontal plane motion was less coupled in the group in remission from rLBP and was associated with t...
We examined the effects of carrying various loads with one hand (up to approximately 10 kg) for a distance of approximately 6 m on trunk kinematics and kinetics among older and obese males. Three-dimensional (3D) trunk angles and moments about the L4/L5 vertebrae were calculated. Results suggest tha...
Description test abstracts
We performed ultrashort echo time magnetic resonance imaging (UTE-MRI) on 13 young and 10 older (>60 yrs) adults. Bicomponent exponential fits were used to characterize the bound (short decay time, T2*s) and free (long decay time, T2*l) water in the Achilles tendon. Older adults exhibited significan...
Muscular hydrostats such as the tongue are modeled using the finite-element (FE) method, which is computationally expensive. To reduce the computational cost, approximate techniques based on dimensionality reduction (DR) and deep neural networks (DNN) have been proposed. On the one hand, linear DR t...
We propose a method to estimate kinematics, kinetics, and muscle forces by tracking inertial sensor data with a musculoskeletal model and a trajectory optimization approach. High correlations with a conventional analysis (optical motion capture and force plate) were achieved for walking and running ...
Shear wave tensiometry is a non-invasive approach that enables the in vivo measurement of tendon stress based on wave propagation speed. Here, both transient and standing wave analyses are used to measure wave speed in isolated tendons subjected to cyclic axial loading. Wave speeds increased monoton...
The purpose of this study was to investigate bilateral lower extremity (hip, knee, ankle) and distal lead foot kinematics during transition step negotiation in young women (YA) and older women with (OFH) and without (ONF) a fall history. Participants in the YA (n=6), OFH (n=4), and ONF (n=3) groups ...
Gait is emerging as a powerful tool to detect early disease and monitor progression across a number of diseases. Typically quantitative gait assessment has been limited to specialised laboratory facilities. However, measuring gait in home and community settings may provide a more accurate reflection...
Older adults experience both sarcopenia and altered propulsive power generation during walking. To examine if non-uniform sarcopenia effects correspond with functional gait changes, we measured individual triceps surae muscle volumes in young and old adults. While muscle volumes were smaller in olde...
Erroneous conclusions about game effects may be made when game simulations or laboratory-based fatigue protocols are used, due to the task-dependent effects of fatigue. This study was the first to investigate how playing an elite U20s basketball game alters trunk control during an anticipated cut ta...
Although exercise therapy is recommended as one of the keystones of non-pharmacological treatment for spondyloartritis, an inflammatory rheumatological disease, little is known about which exercise regime is warranted. Data on spinal mobility and strength are scarce. Hence the aim of the current stu...
The aim of this study is to quantitatively compare threedimensional (3D) shape variations in the talus and calcaneus within individuals with unilateral CAI and healthy controls. Statistical shape models (SSM) of the talus and calcaneus were built based on the mixed data of 26 patients with CAI (mean...
Achilles tendinopathy is an overuse injury that is associated with increased risk of tendon rupture. There is an urgent clinical need to identify predicting risk of injury. Using a combined biomechanical loading and ultrasound imaging model, we mechanically fatigued cadaveric Achilles tendons and fo...
1557326681toc_dec6.pdfUnder the registration form, there are three categories, attendee, speaker and moderator, I don't think it is necessary to have a mandatory question on Role on all the forms. Is it a problem if we remove this field?
Transcutaneous electrical nerve stimulation (TENS) is a nonpharmacologic and noninvasive treatment commonly used by health care professionals as an adjunct treatment for both acute and chronic pain, arising from a variety of painful conditions. This presentation aims to offer a simple overview of th...
Although transient behavior has been reported for commonly used center of pressure parameters, the physiological relevance of this behavior is unclear. This study investigated these transient effects during eyes open and eyes closed stance in a healthy population. Although initial transient effects ...
This study examined the effects of osteoarthritis of the trailing knee on golf performance and rotational kinematics during a golf swing. The study showed that osteoarthritis may cause reduced trunk and knee joint rotations in addition to slower knee rotation velocities, which consequently may cause...
In individuals with recurrent low back pain, symptom remission did not result in a return to back-healthy state of trunk control, based on kinematic coordination and muscle activity.
This study found that sagittal plane trunk posture is associated with relative work contribution of hip and knee extensors during stance phase of running. Specifically, a more flexed trunk is related to less knee extensor work and greater hip extensor work contribution. The information may be utiliz...
The purpose of this study was to use Continuous Relative Phase (CRP) and CRP variability (CRPvar) to characterize coordination patterns in trunk, lumbar and pelvic regions in runners with a history of resolved LBP vs healthy controls (HC). While previous studies have looked at a resolved LBP in runn...
Understanding normal ulnar geometry is important for surgeons planning corrective ulnar osteotomies. We developed a statistical shape model of the ulna to investigate sex differences in its three-dimensional geometry. The model was based on the right and left ulnae of 20 males and 20 females, isotro...
We investigated differences between medial gastrocnemius and soleus muscle contractile behaviour during walking under conditions strategically designed to augment the demand for forward propulsion. Ten young adults walked on a treadmill at 1.2 m/s both normally and with: (i) a 5% horizontal aiding f...
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