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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...
Dynamic materials handling tasks greatly contribute to low back pain cases in the U.S. To biomechanically differentiate between techniques, a musculoskeletal model in OpenSim and EMG-assisted muscle dynamics estimator, the CEINMS software, were used to quantify risk factors for two waste collection ...
A biomechanical model of the lower limb with active three-dimensional (3D) muscles is developed in the open-source Artisynth platform (www.artisynth.org) to simulate knee movement. This model is going to be used in particular to broaden our knowledge about the biomechanical effects of high tibial os...
Complex computational shoulder models have been used to investigate and understand the biomechanics of Reverse Shoulder Arthroplasty(RSA), but despite the advancements in knowledge, impingement and limited ROM still remain a concern. To solve the problem, new technologies were introduced (e.g. Patie...
Single Leg Cycling is capable of providing a potent training stimulus to working muscle. It has applications to in sport performance, rehabilitation, and research. Researchers have reduced biomechanical diffferences between single and double leg cycling in several ways, all requiring specialized equ...
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...
Few studies to date have examined the scaling of gait parameters with respect to body mass in humans of varying body sizes. This study examined how vertical and leg stiffness scale in 40 healthy adults. We calculated scaling exponents for vertical and leg stiffness from kinematic and kinetic data us...
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...
Flapping flight is the most power-demanding mode of locomotion, associated with a suite of anatomical specializations in adult birds. In contrast, many developing birds use their forelimbs long before acquiring "flight adaptations", to enhance leg performance and, in some cases, fly. How does anatom...
Regular papers should present novel perspectives within the general scope of the conference. Short papers (Work-in-Progress) are an opportunity to present preliminary or interim results. Posters are intended for ongoing research projects, concrete realizations, or industrial applications/projects pr...
Long-duration human exposure to microgravity in spaceflight causes various musculoskeletal adaptations. Space agencies have developed varied countermeasure programs to maintain astronaut fitness in these conditions. The documented findings and development of these programs have been researched for i...
The aim of this study was to quantify the test-retest reliability of crank-level variables during maximal cycling. Fourteen track sprint cyclists performed 3 x 4 s seated sprints at 135rpm on an isokinetic ergometer, repeating the session 7.6 ± 2.5 days later. Crank-level variables demonstrated exc...
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...
When asked to be part of this symposium, I was reminded of the feeling I had when receiving my career award from the Canadian Society for Biomechanics – I felt I had made some significant contributions, but still had so many questions and ideas remaining that my career was at best half completed. ...
Shoulder joint is subjected to a very demanding role for athletes as well as workers lifting weights above their shoulders. Type II SLAP (Superior Labral Anterior to Posterior) lesion is the most common type of SLAP. CT scan images were obtained from a patient's shoulder diagnosed with type II SLAP ...
In animal movement, latches enhance the peak power (Pmax) a muscle-tendon (MT) unit transfers to a body mass by 1) providing a resistive force a muscle can shorten against and store energy in the elastic tissues and then 2) acting as a switch that releases the stored elastic energy at a great rate. ...
This study investigates the mechanical effect of load-bearing through a prosthetic socket on the residuum of a transfemoral amputee using a combined musculoskeletal and finite element modelling approach. We use finite element results to estimate the risk of bone resorption in the amputated femur whe...
Grip force (GF) has been related to bone size and strength at the radius shaft in children. We assessed whether grip force would independently predict variance in finite element derived bone strength estimates (failure load and stiffness) at the fracture-prone distal radius. We also assessed whether...
Some people with partial foot amputation have shown calf muscle wastage after using fillers inside their footwear. This research aimed to investigate effects of fillers and footwear on individual calf muscle forces while walking at preferred speed. Gait data of two subjects with partial foot amputat...
Notwithstanding decades of research, predictions from the existing muscle models on eccentric contraction remain elusive. This study aimed to test the possibility that a relatively simple phenomenological muscle model, based on an adapted Hill-type muscle model with some novel assumptions, can captu...
Spinal cord injury (SCI) begins with mechanical insult to the cord (i.e. primary injury), followed by a myriad of biological events such as ischemia, inflammation, etc. that further damage the cord (i.e. secondary injury). The wide variability, or heterogeneity, in human SCI is due partially to biom...
Perception of dance is discernment of reoccurring shapes and patterns. These, in turn are based on numerical relationships that are expressions of space and time. In movement, biomechanical mathematics describe kinematics & kinetics. We ask, is there a biomechanical metric that relates to our aesthe...
The Facial and Ocular CountermeasUre Safety (FOCUS) headform was designed to evaluate injury risk and effectiveness of countermeasures. Many of its segmented facial regions have been evaluated previously and shown to have biofidelic responses. The current study investigated both the biomechanical re...
The purpose of this study was to quantify the effects of using geared wheels on hand-rim kinetics and glenohumeral joint kinetics during wheelchair ramp ascent in individuals with spinal cord injury (SCI). Seven veterans with SCI propelled their manual wheelchairs equipped with geared wheels up a ra...
The Olympic Games are a multi-sport global event with several modalities. Currently, thousands of athletes participate in the Olympic competitions, improving teamwork, organization and union in pursuit of a goal. "Biomechanics", a discipline present in the curriculum of Physiotherapy and Physical Ed...
Biplane radiography is a method of acquiring 3D, dynamic bone motion in vivo. Extracting kinematic output non-invasively requires an accurate 3D bone model that is often derived from a CT (high radiation exposure). Ultrashort echo time (UTE) or “CT-like” MRI offers a potential alternative to CT....
Botulinum toxin type A (BTX-A) is widely used for spasticity management in cerebral palsy. However, recent animal experiments indicate more involved effects of BTX-A on muscular mechanics than just weakening of the injected muscle. Acutely, BTX-A was shown to elevate passive forces and decrease leng...
Many athletes who perform jumping movements in their sport wear a prophylactic ankle brace as an injury preventative measure. However, it has been theorized that stabilization at the ankle joint may cause excessive frontal plane knee angle and moment in females. Limited research has examined the fro...
We used a robotic gait simulator to calibrate and validate the in situ relationship between squared shear wave speed and axial stress in cadaveric Achilles tendons. We first performed isometric plantarflexion simulations at multiple ankle angles to assess linearity and posture-dependence, and to est...
We used a simple musculoskeletal model to determine the ability of an elastic ankle exoskeleton to restore older adult locomotion performance to that of young adults. We found that exoskeleton stiffness (kexo) values greater than 10% of young adult Achilles tendon stiffness (kten*) can reduce the me...
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