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The stride interval variability and complexity were analysed to gain insights into the development of running-related injuries. Yet, it remains unknown the reliability of the stride interval variability and complexity measured at different days and sides. The present study estimated the between-day ...
It has been reported that squatting with the knees forward of the toes increases stress on the knee. A limitation of previous studies in this area is that the influence of shank position has been studied without consideration of trunk position, which has been shown to reduce the knee extensor moment...
Traumatic knee injuries often involve cartilage lesions and may lead to post-traumatic osteoarthritis (PTOA). One of the signs of PTOA is the loss of fixed charge density (FCD) of proteoglycans in cartilage. Mechanisms to understand local adaptive processes remain unclear. A numerical model was deve...
Diabetes mellitus (DM) is the most common metabolic disorder worldwide that might be associated with peripheral neuropathy (DPN). This study aimed to compare the spatiotemporal and impulse characteristics of DM and DPN patients during gait. Using electrodiagnostic test, DPN patients were distinguish...
The purpose of the study was to assess the accuracy of measuring knee kinematics using 3D fluoroscopy with statistical shape models (SSM) of the bones to minimize radiation. The accuracy was determined by comparing results between SSM and CT bone models. The results showed that 3D knee kinematics us...
Knee injury of China’s freestyle skiing athletes of aerial skills project accounts for up to 80% of the total injuries, and the most serious injury is cruciate ligaments injury. This study is to reveal the anterior cruciate ligament(ACL) and posterior cruciate ligament(PCL) injury mechanism and th...
Nihon Kendo Kata, a form of practice where two individuals act out a predetermined protocol, is applied to assess skill level (dan grade) during the assessment for rank promotion in Kendo, a Japanese martial art. It is crucial to assess form for coaching using objective and quantitative methods. The...
The purpose of this study was to examine ‘men-kaeshi-do’ in kendo technique and clarify the common motions and technical differences at the graded technical level of experienced players. The results of the present study revealed technical differences in the motions of the elbow and knee in each ...
Changes in running mechanics during high-intensity running to fatigue remain largely unknown. The purpose of this study was to investigate the changes in kinematics and kinetics during a high-intensity treadmill run to exhaustion. Sixteen national standard male and female middle-distance runners per...
The windlass and the arch-spring are two fundamental models that describe foot function during locomotion. However, the windlass mechanism requires that the plantar fascia is stiff and doesn’t strain, while the arch-spring describes a straining tissue. To examine how these two mechanisms function ...
Overweight and obese children have increased knee abduction angles and moments throughout stance compared to normal weight children.
In recent years many efforts have been done to describe the hemodynamic in intracranial aneurysms, and how it is related to the origin and growth of this cerebrovascular disorder. Numerical simulation has become a widely used tool for the study of hemodynamic; employing idealized and realistic geome...
Musculoskeletal models of the hand rarely include contact mechanics, thereby limiting our ability to model hand-object interactions. Here, two common contact models are used to examine finger-tip contact forces. The contact force is sensitive to finger pad size, when using the elastic foundation mod...
We measured self-reported low back pain (LBP), thorax-pelvis (TP) relative angles and lumbar-pelvis (LP) relative angles as people with a transtibial amputation (TTA) walked with leg length discrepancies (LLDs) of ±20 mm. TP and LP angles were similarly affected by LLDs in the frontal and transvers...
The complex anatomy of the neck creates uncertainty regarding how the central nervous system (CNS) activates individual muscles to stabilize the neck in 3-D. The CNS can tune both the activation and mechanics of muscle to preferred directions where the muscle maximally contributes to stability. In t...
In this paper, we give evidence to support the claim that there are two regions in balance control characterized by open-loop and closed-loop behavior. Subjects were equipped with a skin-stretch feedback device (SSD) at the fingertip to provide sensory augmentation [1]. It was found that skin-stretc...
Development of gait and balance dysfunction is part of the progressive nature of Parkinson’s Disease (PD). Balance dysfunction is often self-reported by individuals only after it has developed. Greater postural sway by individuals with PD has been shown even early in disease progression and thus m...
The time-dependent flow in the vicinity of an arterial branch is considered. The geometries are derived from patients with renal artery stenosis. The details of the flow from the abdominal aorta into the renal artery are considered by well resolved numerical simulations. The flow was compared betwee...
The purpose of this study was to compare the differences in the dominant and nondominant shoulder and trunk range of motion in young female volleyball players. The subjects were 16 healthy female high school volleyball players, and the goniometer was used to measure the shoulder and trunk range of m...
We used two different models to estimate muscle activations during a static and dynamic task involving the ankle. It was found that a multi-objective optimization (MOO) model that included both muscle activation and stability terms better matched experimental activations than a single objective opti...
Many studies showed that the running biomechanics of lower extremity was influenced by running shoes. Recently, gait retraining programs also did exert certain effects on the running impact characteristics. However, few rigorous scientific studies have been conducted to compare the biomechanics of l...
The practice of kinesiology taping has grown in popularity despite the lack of biomechanical evidence of efficacy. This study aimed to evaluate electromyographic activity of the low back during a simple bridge exercise with the hypothesis that there would not be a significant difference in muscle ac...
To confirm the existence of epimuscular myofascial force transmission in humans and function of skin as the medium of it, this study examined if manipulation of the length of the distal extensor digitorum longus muscle (EDL) can alter the distal and proximal tendon forces of the adjacent peroneus lo...
Sit-stand desks (SSD’s) are increasing in popularity, however many people are standing intolerant (SI) due to low back pain (LBP) and this may be a barrier for use. People with LBP have fewer weight shifts in standing compared with more active standing in healthy people. Sedentary office workers, ...
Vertical stiffness (Kv) of the runners was calculated using inertial sensing unit during marathon race. The good runner showed consistent step variables, but the runner decreased running speed showed decrease in Kv earlier or later of decrease in running speed. It is suggested that Kv might be an in...
When evaluation cognition, there is a certain complexity surrounding electroencephalographic (EEG) recordings, which would greatly benefit from being supplemented by secondary recordings, such as those from a force platform. Currently, there is also a lack of evidence supporting the need to implemen...
Adjustable-height desks are promoted to reduce the detrimental effects of prolonged sitting. Musculoskeletal benefits may arise from increased postural variability, often measured as postural sway. We assessed postural sway using inertial measurement units while participants used computer workstatio...
Three-dimensional spring-mass models can be used to study the dynamics and control of running. Cutting manoeuvres are used by running humans to change direction and are of interest because of their relationship to performance and injury. Here we investigate the utility of a 3D spring-mass model for ...
This study aimed to look for the effect on posture control function of leg immersion prior to standstill standing position in healthy young Japanese female (n=12). Postural sway was evaluated by means of tracing fluctuation of COP (center of pressure) in pre and post lower legs-bathing with tap-wate...
Counter-movement jump height along with several kinetic and kinematic measures, decreased following an acute fatigue protocol. However, single-subject analysis revealed that four participants jumped higher following the fatigue protocol as a result of generating greater concentric impulse.
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