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The subtalar joint was locked and unlocked in a dynamic musculoskeletal model of running in participants with varus and valgus knees. There were significant differences in the contact forces in the ankle and knee contact forces. There were no differences found between participants with varus and val...
3.8 million sports and recreational activity related concussions are estimated to occur in the United States Each year, with many occurring in American Football. Reducing concussion in Football is a priority with significant challenges, but with several methods currently under investigation. This si...
Taekwondo is a sport depending on foot techniques, the performances are not only influenced by the strength of lower limb, but also the ability in neuromuscular control of bilateral lower extremities. A good single-leg balance emphasizes the importance of the dynamic balance ability to a Taekwondo a...
The purpose of this study was to assess if wearing augmented and virtual reality googles affect the balance of older adults. Nine community dwelling older adults who could walk without assistive devices participated in the pilot study. Balance was assessment using an AMTI OR6-700 Force Plate with an...
A software toolkit, DRRACO, was developed to use a graphics processing unit (GPU) to perform image processing for biplane fluoroscopy analysis. The GPU is used to quickly generate digitally-reconstructed radiographs (DRRs) of bones, and uses GPU-accelerated image processing functions (convolution, d...
The current standard of care in concussion management involves removal from participation and recovery monitoring via a multifaceted array of measurements. Several established and commonly used methods are used to quantify balance dysfunction after concussion. Emerging research suggests than in addi...
Flip-flop style footwear is assumed to increase slip risk due to shallow treads and non-rigid coupling to the foot. For provoked slips in dry and wet (water) conditions, differences in adhesion effects, absolute normal force, and contact area are suspected to have influenced the coefficient of frict...
Studies have identified that energetic costs of endurance running are similar between the sexes, but less is currently known about economical running biomechanics in female runners than male runners. Evidence shows that female runners have the ability to fine-tune their running mechanics to reduce m...
A prototype lower body soft exoskeleton suit (comprised of varied hip passive elastic bands) was designed to enhance forward skating start performance of hockey players [1]. To better understand the interaction between the suit and athlete, this further study analysed lower body muscle activity (sur...
This study aimed to compare movement patterns among knee osteoarthritis (OA), knee injured and control groups during functional tasks. Injured participants demonstrated a trend to follow OA movement patterns, especially in more difficult tasks. Knee injury implies movement modification similar to OA...
The Low Flexion (LF) test is a clinical test to quantify glenohumeral joint (GHJ) posterior capsule tightness (PCT). However, there is a concern that the lack of scapula stabilization during the measurement may affect the test. This study analyzed scapula positioning during the application of the LF...
Time of the day shows effect on different parameters of human behaviour. In this study we determined whether the time of day influences the height and power of vertical jumps in amateur athletes and non-athletes. Here we describe that time of the day have significant effects on jump height but not p...
An understanding of mechanical work and power during swimming is critical for determining the physiological (and thus behavioral) envelope of bottlenose dolphins. Building on previous work, we present center of mass (COM) estimates of power during a controlled swimming task. These estimates make use...
Underrepresented high school students in the STEM fields received interest-tailored lectures on biomechanics during a 5-week summer program. Changes in student engagement and performance between interest-tailored and generic lectures was assessed. Interest-tailored lectures showed an increase in lec...
Wearable devices enables us to monitor human walking in the field. There is however technical trade off exists between the data richness and the wearable convenience. To extract motion information from the limited measurement data, we propose to exploit the biomechanical characteristics of human gai...
Labral tears in developmental dysplasia of the hip (DDH) may be related to abnormal loads at the acetabular edge. Thus, quantifying in-vivo edge loads can help us clarify the reasons for labral tears. Using image-based musculoskeletal models (MSM), we developed new analyses to project hip joint reac...
The purpose of this study to explore the effect of a 12-week gait retraining program with the minimalist shoes on impact force and lower limb biomechanics. We found that the 12-week gait retraining program with minimalist shoe could effectively convert the rearfoot strike runners who used to wear cu...
Trunk and pelvic segments predominantly move in-phase with one another during trunk flexion and extension. No differences are observed with advancing age in the coordination patterns and coupling angles. Rehabilitation and training prescriptions should be based on healthy segmental coordination for ...
Maturation has been reported as a predictor of injury in physically active adolescents. Asymmetry is commonly associated with pathology and has been reported in adolescent runners. Uninjured adolescent distance runners were stratified by maturity and side-to-side limb symmetry was measured during se...
Clinically, short foot exercise (SFE) is provided to raise the medial longitudinal arch. However, there is no evidence whether this intervention could change the stiffness of medial plantar soft tissue during SFE. The findings in this study demonstrated that Novel Foot Plantar Dynamometer (NFPD), wh...
Noncontact ACL injuries occur during dynamic movements, and females are more than twice as likely to have an ACL injury compared to males. Decision-making tasks have shown altered knee mechanics and may better represent game-like scenarios in the lab. However, it is unknown if the unanticipated stim...
Muscular power depends on force-velocity, activation, and deactivation characteristics, all of which adapt to training. Resistance training programs intended to improve power have produced mixed results. We used previously reported data from heavy and explosive training programs [1,2] to modify musc...
Severe Traumatic Brain Injury (sTBI) commonly leads to gait and balance impairments, but motor strategies adopted by people who suffered of a sTBI have not been characterized yet. Therefore, the aim of the study was to objectively characterize a sTBI population using a set of inertial sensors to des...
The in-vivo dynamic characteristic of normal knee joint is valuable for the cure of knee osteoarthritis and knee prosthesis design. In this study, a unique in-vivo experimental evaluated subject-specific finite element musculoskeletal (FE-MS) model with high accuracy intact knee was created and used...
Due to the increase of deskbound workstyles, there has also been an increase in sedentary behaviour. Walking workstations have been shown to decrease the amount of sedentary time and increase caloric expenditure to combat consequences of sedentary workstyles. Due to the dual-task involved in walking...
Studies examining forefoot strike (FFS) has lower eccentric quadriceps work during the braking phase of the running compared with rearfoot strike (RFS). Lower eccentric quadriceps work may result in lower knee loading. The purpose of this study was to examine whether the patellofemoral joint contact...
Previous research has demonstrated age-dependence in various tendon mechanical and material properties. However, little is known regarding the effect of aging on injury mechanics in damaged fascicles. By loading both mature and aged partially-cut fascicles and observing local deformations, this stud...
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