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Current measures of growth plate shape are limited to 2D. However, bone growth is a 3D process and methods for measuring 3D growth plate changes are critical for understanding direction of bone growth. This research presents a method for quantifying 3D growth plate shape to assess differences betwee...
Gait parameters (locomotion bout, speed, cadence, variability) obtained during long-term recording through wearable sensors are presented for a large cohort to highlight the importance of real-world (RW) gait analysis. A new framework for optimizing gait algorithms in RW situations for each individu...
This study aimed to investigate the ankle joint power during stair ascent in different foot initial contact strategies and to find a better strategy. Twenty healthy young men performed stair ascent with two different initial contact methods, i.e., rear-foot strike and forefoot strike. Forefoot strik...
Wearable sensors enable collection of large quantities of data from real-world movement, but the variety of behaviors recorded makes it challenging to distill generalizable knowledge from these data. This research develops a method for comparing the effects of mobility interventions on frequently-re...
The present study investigated whether a squat training increase knee and hip flexion and extension strength. Twenty-four healthy young men were randomly assigned to a training group (n = 12) or a control group (n = 12). The training group performed a squat training program with 40% of 1-repetition ...
Tracking Soldier gait parameters in the field using a non-obtrusive, shin mounted inertial measurement unit (IMU) may provide increased insight into metrics related to performance and/or injury potential relative to lab-based measurements. However, until recently, wearable sensors lacked the appropr...
The purpose of this study was to determine the decline of gait ability by aging effects for Korean healthy adults in age group of 20s to 80s of 1,507 healthy adults. We conducted the uninterrupted walking of 1 min. duration on treadmill at their self-preferred walking speed using the shoe-type inert...
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...
The medial longitudinal arch (MLA) plays a major role in transferring forces through the foot and to the body. Foot exercises can help the MLA structure in different moments of the stance phase.
We introduce a multiscale muscle spindle model that provides a framework to simulate the effects of altered muscle properties, neural dynamics, and descending drive on muscle spindle sensory feedback. Our recent work shows that muscle spindle stretch responses in relaxed muscle have a unique relatio...
We used a new experimental approach in a rabbit model to test for differences in the rate of force development among the individual quadriceps muscles and to assess their contribution to total torque during force development. We highlight that simultaneous and identical activation does not result in...
Insertional Achilles tendinopathy (IAT) is a common condition in recreational athletes that causes heel pain. The recurring pain may trigger load compensation mechanisms and concomitantly lead to strength and gait asymmetries. 15 patients with unilateral IAT performed maximal isometric ankle plantar...
Wearable sensors, including inertial measurement units (IMUs), are portable and affordable and are quickly becoming a common alternative for biomechanics research. As the biomechanics community begins to embrace this technology and the ability to move out of the traditional laboratory setting, there...
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...
Centre of Pressure (CoP) trajectories were derived from participants walking barefoot, minimally shod and in their conventional footwear. Results showed minimally shod walking to be intermediate between barefoot and conventionally shod walking.
Visual feedback has been shown to assist rehabilitation in populations with motor control deficits. This study uses a laser light worn on the lower limb and a target board to provide visual feedback to post-stroke and MS participants. Kinematic and temporal responses were recorded during a box step ...
Since treadmill walking is a redundant task, there is an underlying control goal such as matching treadmill speed or maintaining constant position. For unperturbed walking and running, the goal is matching average treadmill speed. It is unknown how robust this goal is. This abstract shows that the g...
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 ...
We used finite element analysis to compare the effects of different support conditions on compression fractured vertebras. The results showed that front support is a better design for expandable bone implant systems.
The purpose of this study was to validate the accuracy of MilestonePod (MSP) wireless running sensors and IMeasureU inertial measurement units with custom algorithms (IMU) for subjects wearing combat boots while walking and running. Results indicate that in general, the IMU demonstrates large inaccu...
This abstract expands upon fall detection paradigms to form a more concrete understanding of what is considered a fall. Data was gathered by a waist mounted inertia sensor, consisting of a tri-axis gyroscope and tri-axis accelerometer, from falling events, Full Motion Falls (FMF) and Partial Motion ...
Using a novel rheological model of anterior cruciate ligament (ACL) loading, we estimated ACL force (FACL) in females during drop-land-cut and running manoeuvres, as well as the loading mechanism. In both tasks, peak loading occurred shortly following initial foot contact, but was larger during drop...
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...
The Hintegra® arthroplasty allows ankle movements at sagittal plane, and therefore contribute to restore gait. However, impairments still are observed after rehabilitation and could rely on neuromuscular activation. We determined the timing and amplitude of co-activation of the tibialis anterior an...
Humans are adept at running on rough terrains without falling. Previous modeling work hypothesizes that minimizing tangential collisions is critical for stability. By analyzing thousands of steps from overground rough terrain experiments of human runners, we show that the main mechanism to eliminate...
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...
This study examined the effect of arch-support insole on knee joint biomechanics during stop-jumping. Thirty university basketball players performed stop-jump task in two insole conditions (arch-support and flat). The present results revealed that athletes wearing arch-support insole experienced lar...
In order to reduce the congestion related injuries in greyhound racing, a study was designed to verify the effect of the number of starters on greyhound racing dynamics. The results showed that the injury rates of races with 6 are lower compared to 7 and 8 start races. With 6 greyhounds in a race wh...
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