The accuracy of an external frame using ISB recommended rotation sequence to define shoulder joint angle

A biomechanical model of the press handstand was developed to evaluate and predict the shoulder joint torque requirements as well as the motion of a gymnast’s center of mass (CM) from an initial to a final (handstand) position. Five press handstands executed by gymnasts of differing abilities were filmed and analyzed. The results were compared to the predicted parameters of simulated presses. It was found that execution of the skill with fewer fluctuations in trunk and lower extremities angular velocity—a characteristic of skilled performance—required smoother and at times larger shoulder joint torques. Reduction of the hip joint angle by only 5 or 10° did not substantially reduce the shoulder joint torque requirements. Regarding CM motion, it was found that during performance the CM continuously elevated and remained close to a vertical line passing through the center of the wrist joint. All gymnasts, however, were found to be leaning slightly backward during the first part of the movement and slightly forward during the later phases. Modifications in wrist joint angle required to maintain each gymnast’s CM precisely above the center of the wrist joint were investigated.

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JOINTS ACTIVITY AND ITS ROLE IN THE UPPER EXTREMITY IN BADMINTON STROKES: A BIOMECHANICAL PERSPECTIVE OF SPORTS EDUCATION

Humanities & Social Sciences Reviews ◽

10.18510/hssr.2020.8451 ◽

2020 ◽

Vol 8 (4) ◽

pp. 522-529

Author(s):

Mottakin Ahmed ◽

G. D. Ghai

Keyword(s):

Upper Extremity ◽

Muscle Activity ◽

Shoulder Joint ◽

Elbow Joint ◽

High Performance ◽

Joint Angle ◽

Wrist Joint ◽

Video Camera ◽

Total N ◽

Practice Group

Purpose of the Study: This study aims to describe the muscle activity and its role in the upper extremity in Badminton Strokes and also investigates the Kinematics differences of Badminton forehand overhead shot, i.e., precise, smash and drop in wrist joint, elbow joint, and shoulder Joint from a biomechanics perspective. Methodology: Total [n=10] numbers of male badminton players were randomly selected from the badminton match practice group of L.N.I.P.E. Gwalior, Madhya Pradesh, India. The match practice group consisted of (n=78) players who at least participated in Inter-University badminton competition, and their age ranges from 17-25 years of old. Go Pro HERO 7, 2D camera was used. A video camera was mounted on a tripod at a height of 1.05 meters from the ground. 2D data of wrist joint, elbow joint, and shoulder joint were put in Kinovea 0.8.27 software. One way ANOVA was used. Principal Findings: The results of the finding demonstrate that Brain vibrations, paradoxically, are critical to the stability of movement and high performance. There are significant muscle activity and kinematics differences among forehand clear, forehand smash and forehand drop-in shoulder joint angle, elbow joint angle, and wrist joint angle. Applications of this Study: The Study may use by the badminton Players as well as coaches for the successful execution of badminton Skill. This study will provide the mechanical area of movement of badminton Players. The same kind of study may use in other games. Novelty/Originality of this Study: The Study explores the mechanical advantages of badminton forehand overhead Skill. It will give the reader new ideas to think of a similar kind of study in different games.

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Accurate Shoulder Joint Angle Estimation Using Single RGB camera for Rehabilitation

2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) ◽

10.1109/i2mtc.2019.8827104 ◽

2019 ◽

Author(s):

Muhammad Yahya ◽

Jawad Shah ◽

Kushsairy Kadir ◽

Arif Warsi ◽

Sheroz Khan ◽

...

Keyword(s):

Shoulder Joint ◽

Joint Angle ◽

Angle Estimation

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Learning to Control Orientation and Force in a Hammering Task

Zeitschrift für Psychologie ◽

10.1027/2151-2604/a000088 ◽

2012 ◽

Vol 220 (1) ◽

pp. 29-36 ◽

Cited By ~ 3

Author(s):

Carlijn A. Vernooij ◽

Leonora J. Mouton ◽

Raoul M. Bongers

Keyword(s):

Shoulder Joint ◽

Joint Angle ◽

Wrist Joint ◽

Force Plate ◽

Stone Tools ◽

Human Cognition ◽

Joint Angles ◽

Force Vector ◽

Initial Learning ◽

Control Orientation

The ability to create stone tools is considered an important step in the emergence of human cognition. To further our understanding of these evolutionary processes we focused on the initial learning processes with which this percussive skill may be acquired. We studied a hammering task in which participants had to create a ground force vector by hitting a target on a force plate with a hammerstone. The produced ground force vector was presented as an arrow on a computer screen and had to end in a displayed target. The target could vary in its angle of azimuth and inclination. Over 5 days, three of the five participants adapted a wrist joint angle and two of these three participants adapted a shoulder joint angle that affected only angle of inclination of the ground force vector. Length and angle of azimuth of the ground force vector were not affected. In learning to control a hammering task, the first parameter to be manipulated seems to be the angle of inclination by adjusting the wrist and shoulder joint angles. This suggests that in the initial stages of learning a hammering task only one parameter is adapted.

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