The mDurance® system is an innovative digital tool that combines wearable surface electromyography (sEMG), mobile computing and cloud analysis to streamline automatize the assessment of muscle activity. particularly devised support clinicians sport professionals in their daily routines, as prevention, monitoring rehabilitation training field. This study aimed at determining validity mDurance for measuring activity by comparing sEMG output with a reference system, Delsys® system. Fifteen...

Whereas 3D optical motion capture (OMC) systems are considered the gold standard for kinematic assessment in sport science, they present some drawbacks that limit its use field. Inertial measurement units (IMUs) incorporating gyroscopes have been as a more practical alternative. Thus, aim of study was to evaluate level agreement angular velocity between IMU and an OMC system varying tennis strokes intensities. In total, 240 signals from different body segments types (forehand, backhand...

Accuracy and speed are related to performance in tennis. Most research has focused on little is known about the probabilistic structure of error (i.e. accuracy). In present study 31 advanced players performed a standardised test accuracy was measured using video analysis. Parameters describing 95% confidence ellipses (CEs) forehand backhand were calculated determine errors. Results showed that for both groundstrokes long axis CEs oriented almost parallel sideline. Despite greater ball...

Optoelectronic motion capture systems are considered the gold standard for measuring walking and running kinematics parameters. However, these prerequisites not feasible practitioners as they entail a laboratory environment time to process calculate data. Therefore, this study aims evaluate validity of three-sensor RunScribe Sacral Gait Lab™ inertial measurement unit (IMU) in pelvic terms vertical oscillation, tilt, obliquity, rotational range motion, maximum angular rates during on...

Portable and low-cost motion capture systems are gaining importance for biomechanical analysis. The aim was to determine the concurrent validity reliability of NOTCH® inertial sensors measure elbow angle during tennis forehand at different sampling frequencies (100, 250 500 Hz), using an optical system with sub-millimetre accuracy as a reference. 15 competitive players performed forehands wearing NOTCH upper body marker-set signals from both were adjusted synchronized. error magnitude...

This study aimed to examine the influence of RunScribe location (i.e. lace shoe vs heel shoe) on accuracy spatiotemporal gait characteristics during running by comparing data with a high-speed video analysis system at 1000 Hz. A total 49 endurance runners performed protocol treadmill comfortable velocity. Two systems were used determine parameters contact time, flight step frequency, and length) running: Hz two different placements shoe). The pairwise comparisons showed some between-system...

Chest bands have been the most used device to monitor heart rate during running. However, some runners feel uncomfortable with use of due friction and pressure exerted on chest. Thus, aim this study was determine if photoplethysmography (PPG) system Polar Precision Prime in Vantage M watch could replace chest (Polar V800-H10) same precision. A group 37 people, middle-distance long-distance professional runners, participated study. The submaximal speed determined using 50% participants’...

Photoplethysmography (PPG) heart rate devices are greatly affected by the motion artifacts of running. As a result, their application in training load systems and effort control strategies based on (HR) could be debatable. In 2019, Polar applied some new features PPG to improve accuracy. Thus, purpose this study was determine level agreement between system Precision Prime™ chest strap H10 (reference system) HR monitoring during an interval running protocol. A group 37 long distance runners...

The use of markerless motion capture systems is becoming more popular for walking and running analysis given their user-friendliness time efficiency but in some cases validity uncertain. Here, the test-retest reliability MotionMetrix software combined with Kinect sensors tested 24 healthy volunteers (at 5 km·h−1) 10 15 gait two different trials. All parameters by both are terms reliability. No significant differences (p > 0.05) were found between trials except phases loading response double...

The biomechanics of walking and running, in both ground treadmill conditions, have been extensively analysed important differences reported. Despite some previous studies having examined the validity reliability OptoGait™ system for measuring gait characteristics during walking, no works determined this while running on a treadmill. Therefore, study aimed to determine absolute (within-subject variation) evaluate concurrent spatiotemporal variables at comfortable speed by comparing data with...

This experimental study is aimed at implementing a one-month racket sports programme within sample of students aged 9 to 13 years in order analyze its motivational climate effects during physical education lessons primary school context.The intervention was carried out on 40 the 285 participants, rest were used for descriptive purposes.The subjects participated voluntarily and randomly assigned one two groups: control (n = 20) 20).The consisted eight sessions different (tennis, paddle,...

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Performance in tennis relies heavily on the skilful repetition of several types strokes, yet role motor variability has still received little scientific attention – especially at within subject level. The present study aims to evaluate depending strokes/body segment and level expertise. Thirty-five players performed a field test (including first second serves, forehand backhand strokes) with four synchronized gyroscopes placed trunk, head, upper arm forearm. Variability was measured based...

Monitoring heart rates has always been important for coaches and athletes. Photoplet-ismographic systems (PPG) are supposed to be less capable of determining rate measure in activities with high upper limb movement, such as tennis. Thus, the aim this study was determine concurrent validity Polar Precision Prime ® (PPP ) system existing Ignite sports watch. This accomplished by measuring averaged during a tennis training session, divided three parts (warm-up, main-part cool-down) per 10 s...

Abstract Background Amyloid beta (Aβ) is a protein associated with dementia‐related pathologies such Alzheimer’s Disease (AD). The accumulation of Aβ in the brain leads to neurodegeneration, cognitive decline, and motor impairment. Those factors might appear years before onset apparent symptoms. There evidence for an association between gait performance levels. Previous studies showed that variability has been amyloid older adults mild dementia. Moreover, reduced velocity, greater...

<h3>Background</h3> Non-specific chronic low back pain (NSCLBP) is one of the most common musculoskeletal disorders globally, as approximately 10-40% individuals experience it^[1]. Chronic characterized when persists more than 12 weeks, and non-specific causes are unknown origin^[2]. People with NSCLBP present weakness multifidus, transversus abdominis, internal oblique gluteus maximus muscles difficulties to maintain a coherent walking due lack strength...

The aim was to determine the concurrent validity and reliability of NOTCH ® inertial sensors (IMUs) measure elbow joint angle during tennis forehand at different sampling frequencies (100Hz, 250Hz 500Hz), by comparing data with Optical-Motion-Capture-System (OS) in a sample fifteen competition players. players performed hitting test IMUs OS synchronized. Root-Mean-Square-Error (RMSE) tolerable (5° < RMSE ≤ 10) for all axis frequencies. Lin´s-Concordance-Correlation-Coefficient (LIN CCC) very...