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Tennis is a sport that includes multi-directional movement patterns. Tennis players need core stabilization in order to perform upper and lower limb movements effectively and to protect spinal cord at the same time. 24 tennis players (12 control, 12 training) joined in this study. Evaluation methods...
The physical stress of clinical practice is an occupational risk factor for developing musculoskeletal disorders (MSDs) in dental hygienists. The utilization of dental magnification loupes shows promise in allowing the practitioner to maintain a neutral posture, enhancing quality of care and a reduc...
Recurrent eccentric exercise (EE) has been shown to increase skeletal muscle performance, specifically force production, and decrease susceptibility to subsequent re-injury via protective mechanisms, known as the repeated bout effect (RBE) [1,2]. Eccentric contraction during EE actively stretch musc...
The present study compared the effect of tail/head wind on two reference jumps with different aerodynamic properties (CL and CD) during the flight phase. The computer simulation showed that the wind scenarios used in the present study had a reverse effect on the jumps. Proper wind conditions at the ...
Temporomandibular joint osteoarthritis (TMJ-OA) has considerable prevalence with 13-58.3% of the population. The signs and symptoms of TMJ-OA include joint pain, clicking and crepitus, limited mouth opening, mandibular movement dysfunction, as well as facial esthetic changes, which cause the limited...
Skeletal muscles are typically assumed to behave as single fibres scaled to larger sizes without considering the mechanical effects of greater tissue mass. While previous work has shown that larger muscle size and mass decreases the work and power output of contracting muscle, the metabolic conseque...
Upper limb kinematics may reflect the higher rate of rotator cuff injuries in breast cancer survivors (BCS) after treatment. Motion of BCS and controls was evaluated during functional tasks (FTs). BCS with impingement pain demonstrated lower scapular upward rotation, humeral abduction, and humeral i...
Fracture energy was computed as an objective measure of intra-articular fracture (IAF) severity across multiple joints. Energies were normalized by contact areas to enable comparison of post-traumatic osteoarthritis (PTOA) rates across joints. There was a highly significant relationship between cont...
The relationship of midline frontal theta (MFT) and balance control was measured during standing tasks using electroencephalography and inertial sensors.
The location of the body’s centre of mass (COM) during running can be useful to determine the influence of lower extremity geometry on the ground reaction force (GRF). A full-body marker set is typically used to calculate the COM, but setup can be cumbersome for large data collections. The use of ...
The purpose of this study was to clarify the influence of eye closing during standing on EEG-EEG coherence and EEG-EMG coherence. Eleven healthy young persons participated in this study. Two-leg and one-leg standing were performed for 30 seconds. EEG, EMG, velocity of center of pressure (COP) in the...
We compared the effects of shoe midsole cushioning on the knee compression impulse during the first 50 ms of ground contact between midfoot (MF) and rearfoot (RF) runners, while controlling for the effects of: knee joint angle at contact, knee joint stiffness, shank velocity at contact, pelvis horiz...
This study seeks to investigate the effect of verbal instruction (VI) on muscle activity, with and without muscular pre-exhaustion (PE) on the temporal domain of the surface electromyographic activity (sEMG). Given that PE and VI seem to modify the muscle sEMG, twenty men performed four randomized-s...
Low back pain (LBP) is the most common, and disabling musculoskeletal disorder worldwide, with posture being a modifiable risk factor for LBP. The aim of the study was to assess the effectiveness of a lumbopelvic postural feedback device for changing postural behaviour in a group of healthcare worke...
Indoor rock-climbing falls onto padded and unpadded surfaces are a common source of injuries. This research provides experimental data quantifying the effects of foam thickness and impact velocity in padded falls onto the buttocks using human volunteers and an anthropomorphic test device (ATD).
The Rapid Office Strain Assessment has proven to successfully quantify and reduce the risk of musculoskeletal disorders in office workers. However, since its development, many changes to typical office workstations have occurred as technology has advanced. This study incorporated those changes into ...
High-speed biplanar videoradiography (HSBV) enables new insights on the in-vivo dynamic motions of the pathological spine. Variations in the defined segment specific anatomical coordinate systems (ACS) likely influence repeatability of vertebral kinematics. This study investigated the effects of rep...
Abnormal gait biomechanics, specifically excessive hip adduction and contralateral pelvic drop, have been implicated as a potential cause of overuse injuries in female runners. The purpose of this study was to investigate whether endurance or strength of the hip abductor musculature had a stronger r...
Joint position sense of the dominant and nondominant shoulder was measured in healthy subjects to quantify error in a joint position sense task with and without visual information. Previous studies have examined sensory differences in dominance with conflicting results. Some have shown that no diffe...
To our knowledge, this is the first mapping study investigating cutaneous thermal thresholds of the human torso. We found females to be more sensitive than males, and specific sensitive and insensitive locations, regardless of gender or the temperature protocol used.
The aim of this study was to clarify the effect of wearing a forearm prosthesis on starting block performance in sprint running. One female unilateral below-elbow amputee athlete, a T47 400m medalist in the 2016 Paralympic Games, performed three 10m sprints from starting blocks either wearing a fore...
Resisted sprint training is a traditional way to train the elite athletes. According to the leading joint hypothesis, adding mass on the shanks is seen as a more targeted way to strengthen the special muscles. The aim of this study is to examine the influence of this training method on the kinematic...
Stability in flight is essential for performance and safety in ski jumping. However, the effect of vertical axial wind on the flight stability in ski jumping remains unknown. In this study, the effect of vertical axial wind on the flight stability was analyzed by computational fluid dynamics (CFD) s...
Muscle fatigue of upper extremity with previous shoulder injury in throwing and hitting task, which relates to both release force control and the dynamic stability control, is common in training program and competition occasions. After a fatiguing protocol, we found changes in shoulder and elbow max...
The purpose of this study was to determine the detrimental effects of a high-fat/high-sucrose (HFS) diet on muscle integrity and the contractile properties of single myofibers, and whether prebiotic fibre supplementation (PFS) and moderate aerobic exercise can mitigate these detrimental effects. HFS...
Tai Chi has demonstrated its effectiveness for improving the postural stability of older adults and high fall risk individuals. The effects of Tai Chi on the postural stability of healthy young adults, however, have yet to be investigated. The present pilot study aimed to fill this gap. The pre-/pos...
This study demonstrated that increasing cognitive load and inducing lower extremity muscular fatigue increases muscle activity despite the standing surface. Softening the shoe-surface interface does not seem to be an adequate means of reducing muscular exertion after a fatiguing workload, especially...
The relationship between trunk musculature endurance and running kinematics has been understudied. This study aimed to determine the influence of trunk endurance on sagittal plane joint ranges of motion (ROM) in male and female adolescent long-distance runners. Results suggest that greater trunk end...
The volume of intra-muscular fluid might play an important role in the contribution of intramuscular connective tissue to muscle force development at longer muscle lengths. Additionally, prolonged running may affect intra-muscular fluid volumes by amplified blood flow or dehydration. Therefore, we a...
This study investigated trunk co-contraction during prolonged standing in women with small and large chest sizes. Higher levels of trunk co-contraction were found for the large chest size group. Global flexor-extensors, latissimus dorsi, and the erector spinae (T4, T9, L1 levels) displayed higher co...
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