Digital Dynamometer and Goniometer in Analyzing Isometric Capacities and Tennis Serving

Abstract

Abstract.The study was to investigate relation between tennis serving techniques and shoulder joint muscles in various skilled players in Taiwan. The study used Micro FET3 (Digital Manual Muscle Dynamometer and Goniometer) which appraised the isometric capacity of the shoulder joint and perimeter muscle. The research consists of 13 collegiate male tennis players; 6 players were in elite groups and the other 7 players were in general groups. The tennis players performed 30 servers testing the range to appraise serve technique reflect. The application of t-test and Linear Regression analyzed the serve technique reflect interrelated with the shoulder joint muscle. The muscle strength and the serve accuracy predominate interrelated place where middle trapezius, shoulder internal rotator, and shoulder external rotator of favor hands were obvious. The muscle strength and the serve speed predominated interrelated place where shoulder internal rotator and shoulder external rotator of favor hands were obvious. This study also discovered triceps of favor hands, shoulder extensor, shoulder abductor, triceps, and middle trapezius of non-favor hands muscle strength didn't have any outstanding reference with tennis league table. The research confirmed that the shoulder joint muscle discipline increased shoulder internal rotator, shoulder external rotator, and middle trapezius that help the serve technique reflect. .

Validating the Capability for Measuring Age‐Related Changes in Grip‐Force Strength Using a Digital Hand‐Held Dynamometer in Healthy Young and Elderly Adults

“…Therefore, a novel digital dynamometer with automatic calibration, a larger contact area, automatic grip strength data recording, and continuous hand-grip force data collection might be more convenient for therapists for measuring the quality of hand-grip force control. Recently, digital electronic hand-held dynamometers, such as the MicroFET3 dynamometer [11], were developed with excellent validity and reliability and can be used to measure the muscle strength and continuously record changes in the muscle strength performance, improving clinical diagnoses and analyses of the effects of treatments for neuromuscular diseases [12,13]. The MicroFET3 dynamometer has larger contact areas and can automatically be calibrated before testing for each subject, and data collection can be transferred to a computer via Bluetooth or a USB stick during testing, which is helpful in eliminating man-made bias of data recording [11].…”

“…Recently, digital electronic hand-held dynamometers, such as the MicroFET3 dynamometer [11], were developed with excellent validity and reliability and can be used to measure the muscle strength and continuously record changes in the muscle strength performance, improving clinical diagnoses and analyses of the effects of treatments for neuromuscular diseases [12,13]. The MicroFET3 dynamometer has larger contact areas and can automatically be calibrated before testing for each subject, and data collection can be transferred to a computer via Bluetooth or a USB stick during testing, which is helpful in eliminating man-made bias of data recording [11]. Therefore, the MicroFET3 dynamometer might be more convenient and suitable for evaluating the hand-grip force, but little is known as to whether the Micro-FET3 dynamometer can be used to evaluate hand-grip force performance, because its construct validity for measuring the maximal grip force has not been confirmed with the gold standard measurement tool (the Jamar dynamometer).…”