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The performance of the computers “central processing units” (CPUs), “graphics processing units” (GPUs) and of the “inertial measurement unit” (IMUs) is constantly evolving. In this paper, we apply IMUs data to an avatar in a game “integrated development environment” (IDE) to stimulat...
The medial structures of the knee such as the superficial medial collateral ligament (sMCL), deep medial collateral ligament (dMCL) and posteromedial capsule (PMC) are the most frequently injured tissues and a lot of research has been conducted. However, the length change patterns of these tissues h...
Limb symmetry indices during single-limb hop tasks and counter-movement jumps are often used as screening tools for evaluating knee joint function in injured populations, although no evidence exists to support their use in a paediatric population. We sought to determine whether clinically significan...
Previous studies suggest that the maximum weight for overweight children’s backpacks should be less than 10% of their body weight (BW). In this study we aim to analyse the postural adaptations for obese/overweight and healthy-weight students while carrying a backpack or a school trolley with varyi...
Real world walking environments are constantly changing in both predictable and unpredictable ways. Our previous research suggests that people form a predictive model of their environment that is used to control whole body walking trajectories in response to novel yet consistent environment changes....
This study reports a preliminary longitudinal analysis of shoulder muscles EMG onsets in patients surgically treated for rotator-cuff tear. Fourteen patients were recruited. Anterior Deltoid, Upper and Lower Trapezius onsets were collected during humerus elevation. Three sessions were completed for ...
University of Colorado Colorado Springs students have developed a low-cost video tracking software system for use in biomechanical applications. The objective was to provide an alternative to expensive cameras and force plates to the general community for calculating ground reactions forces (GRF), j...
This study examined the effects of osteoarthritis of the trailing knee on frontal and transverse plane moments during a golf swing. It showed that osteoarthritis reduces the moments about the affected knee and increases the loading on other joints.
Persons with transtibial amputation often exhibit problematic trunk motion during walking, yet optimal clinical interventions have yet to be established. This study applied an induced acceleration simulation analysis to identify differences in the whole-body strategy persons with versus without TTA ...
This study demonstrates an increased contribution of proximal joints to lower extremity dynamics following exertion.
Non-motorized ‘passive’ exoskeleton designs can reduce the metabolic cost of walking by reducing triceps surae activity. We evaluated the consequences of submaximal voluntary activation on the plantar flexion torque-ankle angle relationship. Our preliminary results indicate that this relationshi...
Age-related decline of the physiological functioning of the sensorimotor system negatively affects balance control. According to the hypothesis of reduced complexity with ageing and disease, lower functional complexity of the control system would induce center-of-pressure motion (CoP) of balance tha...
Recordings of in vivo function in two rat distal hindlimb muscles were obtained across gait and grade conditions to analyse how force, fascicle strain and work are modulated in relation to changes in locomotor requirements. In vivo measurements are then used to evaluate Hill-type muscle models based...
Our loading experiment in patients with medial compartment knee osteoarthritis before and after high tibial osteotomy revealed that not only COMP but also MMP-3, MMP-9, C2C, CPII, PRG-4 and IL-6 are sensitive to a walking exercise and that the pre-to postoperative change in knee adduction moment is ...
Achilles tendon moment arm (ATma) has previously been correlated with walking speed in slower walking older adults who were also heavier than faster walkers. Here we investigate the relationship between ATma and locomotor function in end-stage ankle osteoarthritis (OA) patients. Performance on three...
There are no longitudinal studies investigating the joint kinematics of the lower limbs following tibial plateau fracture. This means that physiotherapists and surgeons do not have the quantitative data on changes in function with time, which may be vital for postoperative rehabilitation. This study...
Osteoarthritis (OA) associated chronic pain leads to reduced function and engagement in activities of daily living. This study investigated the efficacy of low-level laser therapy (LLLT) on cartilage integrity. Monoiodoacetate (MIA) model of OA was used to evaluate cartilage degradation following tw...
Obesity leads to a plethora of health risks and in addition, the excess adipose tissue in obese individuals negatively affects skeletal muscle by altering biomechanics and muscle activation patterns. This study was an exploratory study used to determine if muscle activity and lower extremity joint k...
Principal component analysis (PCA) was used to analyze the waveforms of lower-extremity joint moments of 186 healthy adolescents and young adults during over-ground walking gait. Post-puberty gait was characterized by greater hip extension moment in late stance, greater hip external rotation moment ...
Landing is considered a high-risk movement. Understanding lower extremity muscle contributions to three-dimensional ground reaction forces (GRF) may give insight to redesigning safe landing techniques. Five females completed an unanticipated stop-jump task. Musculoskeletal modelling was used to esti...
We analysed the sagittal plane stance phase joint mechanics of athletes with and without unilateral below the knee amputation (BKA) during maximum speed sprinting and long jump. We estimated the strut, spring, motor and damper like function of the main lower extremity joints using functional joint i...
Cadaveric motion tracking data was collected to establish¶ canine cranio-cervical junction (CCJ) kinematics and the role¶ of supporting ligaments. Preliminary analysis suggests that¶ dorsal atlantoaxial (DAL) and alar ligaments (AL) are the¶ main restrictors in atlantoaxial flexion and lateral b...
Acute knee injuries are the most prominent of all severe sporting injuries, whereby neuromuscular deficits and aberrant knee mechanics during landing are well documented as contributing factors [1,2,3]. Participants with greater proprioceptive acuity were found to land with decreased knee flexion at...
Accurately predicting the locomotion state of a person’s next step is critical for control of multifunctional prosthetic devices. The output from the Beta Process Auto Regressive Hidden Markov Model (BP-AR-HMM) provides consistent and concise state output when classifying patterns throughout a gai...
We quantified jumping biomechanics and ultrasound imaging in collegiate basketball players to explore injury screening tools in jumping athletes. Our current results support use of shear wave ultrasound in conjunction with 3D jumping biomechanics compared to convention ultrasound, MRI, and survey sc...
The purpose of this study was to determine if associations existed among hip adduction angle, hip abductor muscle activity, and hip abductor strength in runners. A larger peak hip adduction angle was associated with more tensor fascia lata activity magnitude during running. Stronger hip abductors we...
Rollators are frequently prescribed for older persons suffering from gait and balance disorders in order to improve mobility and quality of life. Rollators are designed to decrease the risk of falls by improving gait mechanics of their users. However, data on the biomechanics of rollator assisted ga...
Energy absorption in the lower extremity during a 90 unilateral cut was assessed in collegiate female soccer players pre and postseason using a 6 degree-of-freedom (DOF) power analysis. Intervention team completed the [FIFA] 11+ during the season, control team players did not. Players in both gro...
Sit-to-stand (STS) is an important activity of daily living. Individuals with Prader-Willi Syndrome (PWS) have larger internal ankle moments and larger proportion of ankle moment distribution compared to individuals with and without obesity. Improving STS characteristics may contribute to greater mo...
The purpose of this study was to develop and validate soft and rigid tissue mass prediction equations for the thigh, leg, and leg-foot segments of living older adults. Comprehensive anthropometric measurements were used to develop the prediction equations using multiple linear regression. Actual low...
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