Global, fine and hidden sports data: applications of 3-D vision analysis and a specialised data glove for an athlete biomechanical analysis system

2002 ◽  
Author(s):  
F. Iredale ◽  
T. Farrington ◽  
M. Jaques
Keyword(s):  
Biomechanical Analysis ◽  
Data Glove ◽  
Analysis System ◽  
Sports Data

S1601-2-4 Biomechanical analysis system of upper limb during pitching using body-mounted sensor

2009 ◽  
Vol 2009.5 (0) ◽  
pp. 185-186
Author(s):  
Hideharu KODA ◽  
Koichi SAGAWA ◽  
Kouta KUROSHIMA ◽  
Toshiaki TSUKAMOTO ◽  
Kazutaka URITA ◽  
...  
Keyword(s):  
Upper Limb ◽  
Biomechanical Analysis ◽  
Analysis System

Comparison of Endpoint Data Treatment Methods for the Estimation of Kinematics and Kinetics Near Impact During the Tennis Serve

2012 ◽  
Vol 28 (1) ◽  
pp. 93-98 ◽  
Author(s):  
M. M. Reid ◽  
Amity C. Campbell ◽  
B. C. Elliott
Keyword(s):  
Upper Limb ◽  
Treatment Method ◽  
Biomechanical Analysis ◽  
Quintic Spline ◽  
Tennis Serve ◽  
Analysis System ◽  
Endpoint Data ◽  
Spline Filter ◽  
The Impact ◽  
Kinematics And Kinetics

Tennis stroke mechanics have attracted considerable biomechanical analysis, yet current filtering practice may lead to erroneous reporting of data near the impact of racket and ball. This research had three aims: (1) to identify the best method of estimating the displacement and velocity of the racket at impact during the tennis serve, (2) to demonstrate the effect of different methods on upper limb kinematics and kinetics and (3) to report the effect of increased noise on the most appropriate treatment method. The tennis serves of one tennis player, fit with upper limb and racket retro-reflective markers, were captured with a Vicon motion analysis system recording at 500 Hz. The raw racket tip marker displacement and velocity were used as criterion data to compare three different endpoint treatments and two different filters. The 2nd-order polynomial proved to be the least erroneous extrapolation technique and the quintic spline filter was the most appropriate filter. The previously performed “smoothing through impact” method, using a quintic spline filter, underestimated the racket velocity (9.1%) at the time of impact. The polynomial extrapolation method remained effective when noise was added to the marker trajectories.

Biomechanical Analysis on the Foot under Normal and Abnormal Gait for Orthotics Design

2007 ◽  
Vol 353-358 ◽  
pp. 2179-2182 ◽  
Author(s):  
Jae Ok Lee ◽  
Young Shin Lee ◽  
Se Hoon Lee ◽  
Young Jin Choi ◽  
Soung Ha Park
Keyword(s):  
Gait Analysis ◽  
Human Body ◽  
Center Of Pressure ◽  
Reaction Force ◽  
The Body ◽  
Biomechanical Analysis ◽  
Gait Characteristics ◽  
Abnormal Gait ◽  
Experimental Apparatus ◽  
Analysis System

The foot plays an important role in supporting the body and keeping body balance. An abnormal walking habit breaks the balance of the human body as well as the function of the foot. The foot orthotics which is designed to consider biomechanics effectively distributes the load of the human body on the sole of the foot. In this paper, gait analysis is performed for subjects wearing the orthotics. In this study, three male subjects were selected. The experimental apparatus consists of a plantar pressure analysis system and digital EMG system. The gait characteristics are simulated by ADAMS/LifeMOD. The COP (Center of Pressure), EMG and ground reaction force were investigated. As a result of gait analysis, the path of COP was improved and muscle activities were decreased with orthotics on the abnormal walking subjects.

scholarly journals 2D Video Analysis System to Analyze the Performance Model of Figure Roller Skating: A Pilot Study

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 155
Author(s):  
Cristian Romagnoli ◽  
Vincenzo Bonaiuto ◽  
Giorgio Gatta ◽  
Naomi Romagnoli ◽  
Anas Alashram ◽  
...  
Keyword(s):  
Video Analysis ◽  
Center Of Mass ◽  
Performance Model ◽  
Biomechanical Analysis ◽  
Knee Joints ◽  
Jump Height ◽  
Compensatory Strategy ◽  
Medium Level ◽  
Analysis System ◽  
High Level

Figure roller skating is a discipline composed of various movements which involve jumps, artistic figures and spins in a seamless program which has both technical and shapely difficult. A biomechanical analysis of a double salchow was performed using a 2D video analysis of one European and in two Italian roller skaters. On average, the high level (HL) roller skater showed a horizontal velocity of the center of mass higher than the average, especially in the prop stage, whereas the medium level (ML) and low level (LL) athletes reduced their velocity significantly. The spin angular velocity of the ML and LL skaters was always higher than of the HL. This phenomenon would seem to be a compensatory strategy for a lower jump height, with a reduced trunk-thigh angle and less thigh lever arm (coxo-femur/knee joints) during the take-off and landing phases of the double salchow jump.

BIOMECHANICAL ANALYSIS OF THE ELBOW JOINT LOADING DURING PUSH-UP

2008 ◽  
Vol 20 (04) ◽  
pp. 197-204 ◽  
Author(s):  
Pei-Hsi Chou ◽  
Shu-Zon Lou ◽  
Shen-Kai Chen ◽  
Hsin-Chieh Chen ◽  
Tsung-Hsien Wu ◽  
...  
Keyword(s):  
Axial Force ◽  
Elbow Joint ◽  
Reaction Force ◽  
Force Plate ◽  
Biomechanical Analysis ◽  
Male Students ◽  
Hand Position ◽  
Flexion Moment ◽  
Analysis System ◽  
Push Up

The purpose of this study was to investigate the static and dynamic forces within the joints during push-up loading of the upper extremity. Ten healthy male students volunteered for this study. They were asked to complete six sets of push-ups in five different hand positions. The Expert Vision Motion Analysis System with six CCD cameras, and a Kistler force plate was used to measure the relative joint position and ground reaction force. Hand position was found to have a statistically significant effect on the axial force. The maximum axial force decreased from "normal" when hands were placed "apart" (45.0% BW, p = 0.012) or "superior" (44.5% BW, p = 0.01). Hand position had a significant effect on the flexion moment of the elbow joint. A greater reduction of flexion torque at 997.3 N-cm (p = 0.001) was experienced with hands "apart." Greater flexion torque existed throughout the cycle with hands "together" and equaled 2301.4 N-cm (p = 0.002). This study provides information about the kinematic and kinetic patterns of the upper extremities, and how hand position affects intersegmental loading. Attention must be given to the valgus torque encountered during push-up exercises. Patients with medial collateral ligament repair and total elbow arthroplasty should be protected from such exercises immediately post-treatment.

BIOMECHANICAL ANALYSIS OF CHAIR RISING IN THE PREGNANT WOMEN

2003 ◽  
Vol 15 (04) ◽  
pp. 157-159 ◽  
Author(s):  
PEI-HSI CHOU ◽  
PO-LIN YAO ◽  
YOU-LI CHOU ◽  
JEAN-NNA HONE ◽  
TING-SHENG LIN
Keyword(s):  
Pregnant Women ◽  
Great Influence ◽  
Pregnant Female ◽  
Biomechanical Analysis ◽  
Ankle Joints ◽  
Reaction Forces ◽  
Analysis System ◽  
In The Beginning ◽  
Chair Rise ◽  
Biomechanical Factors

There were so many changes in physiological and psychological aspects during pregnancy. Rising from a chair was an important functional activity of daily life. These changes impose postural demands and limit the performance of activities of daily living. The overall goals of this study were to quantify the effects of physiological change due to pregnancy on the performance of chair-rise and to analyze why some pregnant female have more difficulty with these tasks. Twenty-four pregnant women were included in this study to investigate the performance and possible related biomechanical factors of chair-rise. Body movements of these subjects were recorded using video-based motion analysis system. Three force plates were applied to obtain the ground reaction forces of foot, seat and armrest. Kinematics and kinetics data were analyzed to evaluate the angles and moments of the hip, knee and ankle joints. The result indicated that the maximum moment of the three joints occurred nearly in the beginning of extension phase. As the chair height increased, the maximum flexion angles decreased significantly at the hip, knee, and ankle joints. The chair height had great influence on knee joint and hip joint moments, but less on ankle joint. In the third stage (chair height: 65% KH), the maximum hip moment significantly decreased because of a remarkable increase in abdominal depth. In contrast to the hip moment, the maximum knee moment greatly increased. This result revealed the reason why pregnant female have more difficulty on the performance of chair-rise. Additionally, rising with the armrest for pregnant female would significantly decreased the maximum knee moment. This study suggested that pregnant female should select armrest or higher chair to decrease the joint loading during chair-rise.

scholarly journals Biomechanical Analysis of Successful and Unsuccessful Snatch Lifts in Elite Female Weightlifters

2019 ◽  
Vol 68 (1) ◽  
pp. 69-79 ◽  
Author(s):  
Andrzej Mastalerz ◽  
Paulina Szyszka ◽  
Weronika Grantham ◽  
Jerzy Sadowski
Keyword(s):  
Performance Analysis ◽  
Body Movement ◽  
Center Of Gravity ◽  
The Body ◽  
Biomechanical Analysis ◽  
Hip Joints ◽  
Factors Affecting ◽  
Analysis System ◽  
Biomechanical Factors

AbstractThe aim of this study was to identify biomechanical factors affecting successful and unsuccessful snatch attempts in elite female weightlifters during the 2013 World Weightlifting Championships. Fourteen female competitors took part in this study. Their successful and unsuccessful snatch lifts with the same load were recorded with 2 camcorders (50 Hz), and selected points were digitized manually on to the body and the barbell using the Ariel Performance Analysis System. The kinetic and kinematic barbell movement as well as the athlete’s body movement variables during the liftoff phase were examined. The results of this study show statistical differences (p ≤ 0.05) between successful and unsuccessful attempts in relation to the angle values in the knee and hip joints in preparation for the aerial phase position. Similarly, the center of gravity velocity was significantly higher in successful attempts during the catch phase. Thus, coaches should pay particular attention to the accuracy of the execution in preparation for the aerial phase position and to the velocity of the center of gravity of the competitors during the catch phase.

scholarly journals PENGURANGAN RISIKO MUSCULOSKELETAL DISORDERS PADA AREA MESIN LASER PERFORATOR DI PERUSAHAAN ROKOK MENGGUNAKAN OWAS DAN QFD

2021 ◽  
Vol 16 (3) ◽  
pp. 177-188
Author(s):  
Hery Hamdi Azwir
Keyword(s):  
Musculoskeletal Disorders ◽  
Musculoskeletal System ◽  
Quality Function Deployment ◽  
Compressive Force ◽  
Biomechanical Analysis ◽  
Posture Analysis ◽  
Working Posture ◽  
Safe Limit ◽  
Analysis System ◽  
Production Company

Di dalam perusahaan produksi rokok ini terdapat sebuah mesin laser perforator. Setelah pemasangan mesin laser perforator 50 timbul masalah yang berhubungan dengan gangguan muskuloskeletal. Saat dilakukan wawancara, operator mengeluhkan adanya nyeri punggung bawah  karena penanganan material dilakukan secara manual. Setelah dilakukan analisis dengan metode OWAS pada dua kegiatan bongkar muat ditemukan masalah yang berhubungan dengan gangguan muskuloskeletal. Dari hasil analisis ditemukan bahwa aktivitas pemuatan (loading) dikategorikan sebagai tindakan korektif 3 artinya postur tubuh berpengaruh sangat merugikan pada sistem muskuloskeletal, sedangkan kegiatan pembongkaran (unloading) termasuk tindakan korektif 2 yang tidak berpengaruh nyata terhadap sistem muskuloskeletal. Selain itu, analisis gaya tekan dilakukan hanya untuk aktivitas pembebanan terhadap gaya tekan total yang bekerja pada L5/ S1. Gaya tekan untuk aktivitas pembebanan adalah 7.186,22 Newton atau lebih dari dua kali lipat dari batas aman maksimum 3.400 Newton. Perbaikan dilakukan dengan menggunakan metode QFD. Sebagai solusinya adalah dibuat troli. Troli tersebut mampu mereduksi gaya tekan total pada aktivitas pembebanan menjadi 3.180,52 Newton dan berhasil mengubah menjadi kategori tindakan korektif 1. Abstract[REDUCTION OF MUSCULOSCELETAL DISORDERS RISK ON LASER PERFORATOR MACHINES AREA IN CIGARETTE COMPANIES USING QFD AND OWAS] Inside this cigarette production company, there is a laser perforator machine. After the installation of the laser perforator machine 50, problems related to musculoskeletal disorders arise. During the interview, the operator complained about low back pain due to manual handling of the material. After analyzing the OWAS method on two loading and unloading activities, problems were found related to musculoskeletal disorders. It was found that the loading activity was categorized as 3 meaning that posture had a very detrimental effect on the musculoskeletal system. Meanwhile, unloading activities included category 2 which had no significant effect on the musculoskeletal system. In addition, the biomechanical analysis was carried out only for the loading activity against the total compressive force acting on L5 / S1. The compressive force for loading activity is 7,186.22 Newton or more than twice the maximum safe limit of 3,400 Newton. Repairs were made using the QFD method. The solution is to make the moving trolley. The moving trolley is able to reduce the total compressive force on the loading activity to 3,180.52 Newton and also, reduce the level to category 1.Keywords: biomechanics; musculoskeletal disorders; Ovako Working Posture Analysis System; OWAS; Quality Function Deployment; QFD; Trolley

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