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The Upper Quarter Y Balance Test (YBT-UQ) is a closed-chain upper extremity (UE) test that allows clinicians to assess unilateral UE function in the reaching and the stabilizing limb. There are several aspects of the YBT-UQ that have been studied (reliability, validity, correlations to other functio...
Resistance training (RT) can determine changes in muscle and tendon mechanical properties that can now be evaluated properly with Supersonic Shearwave Imaging (SSI). The aim of the present study was to investigate the chronic effect of 8-week RT on Vastus Lateralis (VL) and patellar tendon (PT) mech...
A new variable stiffness torsion adapter for a lower limb prosthesis was developed to reduce soft tissue shear stress in the residual limb by reducing transverse plane stiffness during activities of daily living. However, direct measures of shear stress are challenging due to the inability to optica...
This aim of this study is to use an infrared-assisted trunk accelerometer-based gait analysis system to real-time investigate and compare gait quality of chronic stroke patient with healthy participants in the teaching hospital. Compared with heathy participants, walking speed, cadence, step length,...
This study characterizes plantar pressure differences between hallux valgus patients and healthy controls using statistical parametric mapping (SPM). The plantar pressure differences are minimal which, combined with previous studies, suggest high variability in the plantar pressures of hallux valgus...
As a part of “Non-operative treatment of Achilles tendon Rupture in Central Finland: a prospective cohort study – NoARC” results from the first 12 patients who completed biomechanical assessments 1 year after active, structured, and functional non-surgical treatment of acute Achilles tendon (A...
Three-point jump shot is a necessary skill for basketball players. However, the injuries often occur while landing. This injury may be caused by an accident while competing or practicing sports.
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...
Total knee arthroplasty (TKA) candidates are demographically and biomechanically heterogeneous and can be well characterized by four cluster phenotypes related to functional improvement post-TKA. Cluster profiling can support triaging and developing osteoarthritis (OA) treatment and surgical strateg...
The incidence of knee injuries in sport are well documented with several key variables associated with the risk of injury during cutting and landing identified. The contribution of lower extremity muscle activity is lesser known but may provide insights into the mechanisms as well as training and pr...
The purpose of this research was to clarify a mechanism of body orientation change at the approach phase to curved path in the sprinting event such as 200m or 400m. As a result, the authors revealed that the direction of the runner’s velocity already changed before the curvature. Then, once runner...
Collecting and analyzing single view 2D videos could serve as a clinically feasible surrogate to assessing kinematics with 3D motion capture, which is typically used for laboratory research. The purpose of this study was to develop a novel algorithm that tracks markers in 2D videos, and to test the ...
Ankle sprains are one of the most common musculoskeletal injuries, leading to chronic ankle instability (CAI) in 30-40% of first-time sprains. Clinicians assess passive stability under non-weight-bearing conditions, but their relevance to weight-bearing conditions when ankle sprains occur is unclear...
Previous research has suggested that several critical features are associated with the ability of surfers to successfully land two aerial variations, the Frontside Air (FA) and Frontside Air Reverse (FAR). We aimed to investigate whether surf-like simulated aerial landings replicated the key critica...
Running is a bilateral activity, but the majority of running injuries are unilateral. Differences in load experienced by the left and right sides of the body may help explain this paradox. This study examined the prevalence of left/right asymmetry among 30 recreationally active adults running at 1.8...
The objective of the study was to report axial stiffness changes in participants with low back pain (LBP) after two weeks of treatment with a non-thrust chiropractic spinal manipulative technique (flexion-distraction). Twelve participants with LBP (age 18-65; mean: 42) were recruited for this study....
The arm of this study was to understand the differences in biomechanical characteristics between running one and two-legged vertical jumps. 10 male college volleyball players performed one and two-legged vertical jumps randomly. Kinematic and kinetic data were collected by using Six infra-red Qualis...
Quantifying shoulder motion using body-worn inertial measurement units (IMUs) is not straight forward and requires addressing numerous challenges. We describe these challenges and use a sample data set to illustrate effects of protocol and algorithm choices on calculated shoulder angles. Finally, we...
Most running injury studies have used either purely biomechanical or purely epidemiological methods. Results from biomechanical studies comprise stepwise kinematic and/or kinetic variables,e.g. joint angles and/or moments, while results from epidemiological studies comprise training variables (e.g. ...
This presentation will focus on the first results from a one year prospective cohort study on running-related injuries (RRI) conducted in Gothenburg, Sweden. The study combined biomechanical and epidemiological measures to try to shed light on the associations between possible risk factors (clinical...
The lack of an efficient scientific framework that simplifies the analysis of socket-stump interaction is one of the key reasons why physics-based socket modelling techniques are not prevalent. Herein, we propose a novel scientific framework that generates detailed subject-specific 3D models of the ...
We used Computational Fluid Dynamic (CFD) simulations to calculate aerodynamic drag forces, measured the metabolic cost of overcoming small resistive forces and then translated the metabolic savings from drafting to improvements in marathon running performance. We find that every kilometer that an e...
Unilateral transtibial amputees have an altered walking gait including asymmetry between the intact limb and the prosthetic limb. Here we show that ankle taping on non-amputees induces left-right asymmetries in anterior/posterior ground reaction forces during walking similar to those seen in individ...
There is a clear need for prospective experiments that include the tracking of day-to-day running exposures to better understand running-related injury (RRI) development. In this presentation, preliminary results of a 1-year online prospective survey study regarding the influence of week-to-week cha...
Characterization of mechanical load under realistic conditions provides meaningful context for injury risk in runners. The purpose of this study was to determine how reaction forces (RFs) experienced immediately after foot contact were associated with swing and stance leg accelerations measured by i...
Training errors are often implicated in the development of running-related injuries (RRIs), yet little is known about "how much is too much" when it comes to progression of training loads. Biomechanical factors are also believed to moderate RRI risk since the magnitude and distribution of forces dep...
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. ...
With recent developments in the resolution with which spine skin-surface motion is tracked, the opportunity presented itself to calculate dynamic spine stability across smaller sub-regions of the lumbar spine. Additionally, the effect of constraining pelvis motion on dynamic spine stability isn’t ...
The purpose of this research was to examine affordances and postural mechanics for manual materials handling in tasks that were embedded with visual directional cues. We found that cues could modify occupational behaviour and handling biomechanics in work tasks. Directional cues might provide a usef...
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