scholarly journals Analisis Gerakan Forehand Pada Tenis Meja Di Klub PTM Elektra Kab Demak

2020 ◽  
Vol 1 (1) ◽  
pp. 25-31
Author(s):  
Dyah Ismi Mukaromah ◽  
Husnul Hadi ◽  
Muh. Isna Nurdin
Keyword(s):  
Body Position ◽  
Hand Movement ◽  
Biomechanical Analysis ◽  
Table Tennis ◽  
Upper Arm ◽  
Left Hand ◽  
Left Elbow ◽  
Significant Difference ◽  
The Right ◽  
Leg Position

     The background is because the athlete only uses a forehand to defend, whereas a forehand is good for attacking. The formulation of the problem, how to analyze the biomechanics of forehand motion in table tennis and how good hand movements, body position and leg position using forehand movements, whether the 9 angles of the movement affect the entry or absence of the ball. The aim of this research is to know how the biomechanical analysis of forehand motion in table tennis and to find out how good hand movement, body position and leg position using the forehand movement of the 9 angles affect the entry or absence of the ball. Based on processing using statistics, there is a significant difference in comparisons when the ball position hits the bet; 1) wrist position 167.875o-223.8o; 2) bending of the right elbow 82,9o-92,1o; 3) bending of the left elbow 86.24o-95.82o; 4) opening of the upper arm of the right hand 71.06o-78.95o; 5) opening of the upper arm of the left hand 45.45o-50.5o; 6) leaning body 145.54o-161.71o; 7) right leg bending 152.6o-169.5o; 9) distance of both feet 44.05o-48.94o.   Keywords: Forehand, Table Tennis.     ABSTRAK       Latar belakang karena atlet hanya menggunakan pukulan forehand untuk bertahan, padahal pukulan forehand bagus untuk menyerang. Rumusan masalah, bagaimana analisis biomekanika gerakan forehand pada cabang olahraga tenis meja dan bagaimana gerakan tangan, posisi badan dan posisi kaki yang baik dengan menggunakan gerakan forehand apakah dari 9 sudut gerakan tersebut mempengaruhi masuk atau tidaknya bola. Tujuan penelitin ingin mengetahui bagaimana analisis biomekanika gerakan forehand pada cabang olahraga tenis meja dan untuk mengetahui bagaimana gerakan tangan, posisi badan dan posisi kaki yang baik dengan menggunakan gerakan forehand apakah dari 9 sudut gerakan tersebut mempengaruhi masuk atau tidaknya bola.Berdasarkan pengolahan dengan menggunakan statistik, terdapat perbedaan perbandingan yang signifikan saat posisi bola mengenai bet; 1) posisi pergelangan tangan 167,875o-223,8o; 2) tekukan siku kanan 82,9o-92,1o; 3) tekukan siku kiri 86.24o-95.82o ; 4) bukaan lengan atas tangan kanan 71,06o-78,95o ; 5) bukaan lengan atas tangan kiri 45,45o-50,5o; 6) kecondongan badan 145,54o-161,71o; 7) tekukan kaki kanan 152,6o-169,5o ; 9) jarak kedua kaki 44,05o-48,94o.   Kata kunci: Forehand, Tenis Meja.  

scholarly journals Unusual presentation of late-onset disseminated staphylococcal sepsis in a preterm infant

2019 ◽  
Vol 12 (3) ◽  
pp. e226325 ◽  
Author(s):  
Shahzad Gul Khattak ◽  
Ian Dady ◽  
Devdeep Mukherjee
Keyword(s):  
Late Onset ◽  
Whole Body ◽  
Whole Body Mri ◽  
Left Hand ◽  
Non Invasive ◽  
Male Baby ◽  
Left Elbow ◽  
The Right ◽  
Panton Valentine Leukocidin ◽  
Rule Out

An ex-30-week gestation, preterm male baby was admitted to a tertiary neonatal unit and noted to have increased ventilator requirements and diagnosed with sepsis. The baby also developed an abscess over the left elbow and over the xiphisternum along with a decrease in movement of the left hand and the right leg. Panton-Valentine leukocidin (PVL)-producing Staphylococcus aureus (SA) was isolated from the blood culture. A whole body MRI showed disseminated abscess with multiple foci in the lung, left elbow and over the xiphisternum. Disseminated sepsis with multiple septic foci has not been previously reported in neonates. We would like to highlight the fact that sepsis due to PVL toxin-producing SA can cause significant morbidity and mortality in neonates. Proper screening should be done to rule out septic foci in neonates. MRI is a good non-invasive investigation to document septic foci in a neonate and rule out multiorgan involvement.

scholarly journals Lateral comparisons using Fishman's skeletal maturation assessment

2014 ◽  
Vol 85 (3) ◽  
pp. 408-412 ◽  
Author(s):  
Abraham N. Safer ◽  
Peter Homel ◽  
David D. Chung
Keyword(s):  
Bone Development ◽  
Surgical Patients ◽  
Skeletal Maturation ◽  
Age And Gender ◽  
Left Hand ◽  
Right Hand ◽  
Significant Difference ◽  
Left And Right ◽  
And Gender ◽  
The Right

ABSTRACT Objective:  To assess lateral differences between ossification events and stages of bone development in the hands and wrists utilizing Fishman's skeletal maturation indicators (SMIs). Materials and Methods:  The skeletal ages of 125 subjects, aged 8 to 20 years, were determined with left and right hand-wrist radiographs using Fishman's SMI assessment. Each subject was also given the Edinburgh Handedness Questionnaire to assess handedness. The skeletal ages of both hand-wrist radiographs were analyzed against each other, handedness, chronologic age, and gender. Results:  There were no significant differences overall in right and left SMI scores (P  =  .70); 79% of all patients showed no difference in right and left SMI scores, regardless of handedness, gender, or age. However, when patients were categorized based on clinical levels of SMI score for the right hand-wrist, there was a significant difference (P  =  .01) between the SMI 1-3 group and the SMI 11 group. Subjects in the SMI 1-3 group were more likely to show a left > right SMI score, while subjects in the SMI 11 group were likely to show a right > left SMI score. Conclusion:  Although no significant overall lateral differences in SMI scores were noted, it may be advisable to obtain a left hand-wrist radiograph and/or additional diagnostic information to estimate completion of growth in young surgical patients.

Handwriting, Typewriting and Handedness

1968 ◽  
Vol 20 (3) ◽  
pp. 282-289 ◽  
Author(s):  
K. A. Provins ◽  
D. J. Glencross
Keyword(s):  
Performance Levels ◽  
Positive Correlation ◽  
Left Hand ◽  
Right Hand ◽  
Significant Difference ◽  
The Right ◽  
Two Sides

The performance of two groups of 20 trained touch typists and one group of 20 nontypists was tested on seven different typewriting exercises. Three of these exercises were executed entirely with the right hand and three were completed using only the left. A comparison of performances of the two sides showed, for the typists, no differences between the sides or a difference in favour of the left hand; and for the non-typists, a difference between hands in favour of the right side in two of the three comparisons. A comparison of handwriting performance with the preferred and non-preferred hands was carried out on 80 subjects. Apart from a highly significant difference in performance between the sides in favour of the preferred hand, this task showed, as did the typewriting task, a marked positive correlation between the performance levels of the two sides. These findings are briefly discussed in relation to the training histories of the subjects.

scholarly journals COMPARAÇÃO DA RESTRIÇÃO VENTILATÓRIA EM TÉCNICAS DE FISIOTERAPIA RESPIRATÓRIA E ALTERAÇÕES DE POSICIONAMENTO

2015 ◽  
Vol 13 ◽  
pp. 271
Author(s):  
Kelser De Souza Kock ◽  
Camila Mendes Flor Paz ◽  
Cindy Maximiano Faraco ◽  
Fernando Rodrigues Onofre ◽  
Laís Bruna Ávila De Souza ◽  
...  
Keyword(s):  
Lung Volume ◽  
Vital Capacity ◽  
Body Position ◽  
Respiratory Therapy ◽  
Sitting Position ◽  
Lung Capacity ◽  
Significant Difference ◽  
Lateral Decubitus ◽  
Respiratory Physiotherapy ◽  
The Right

Introduction: Body position affects the respiratory mechanics and could be favorable to pulmonary function when combined with respiratory physiotherapy. Objective: Was to compare the ventilatory restriction in respiratory therapy techniques and changes of position. Method: For analysis of lung volume was measured Slow Vital Capacity (SVC) in university students in the positions: sitting, dorsal decubitus (DD), DD with application of maneuver thoracic blockade of the right hemithorax and right lateral decubitus (RLD). In all maneuvers were instructed to perform an inspiration to total lung capacity and slow exhalation to residual volume. Results: It was evaluated 26 subjects with a mean age of 25,5 ± 11 years and mean body mass index of 25 ± 4 kg/m2. The values obtained from SVC sitting, DD, DD with blockade and DLD were respectively 3,5 ± 1,5 liters (87,7 ± 26,8%); 2,9 ± 1,4 liters (75,0 ± 26,5%); 3,0 ± 1,4 liters (75,2 ± 26,2%); 3,5 ± 1,6 liters (88,3 ± 29,4%). Using the SVC in a sitting position as compared, there was no statistical difference in DD (p = 0,024) and DD with position blockade (p = 0,036). There was no significant difference in the DLD (p = 0,459) position. Conclusion: Can conclude that the positions DD and DD with blockade reduced lung volume, whereas DLD position showed no significant difference when compared to sitting position, suggesting that this position is an option favorable position for respiratory therapy.

scholarly journals The Effect Ofinitial Practice with Dominant and Non-Dominant Hand on Acquisition, Retention and Transfer of a Complex Motor Task

2017 ◽  
Vol 14 (3) ◽  
pp. 1067-1074 ◽  
Author(s):  
Malihe Moones Tousi ◽  
Toktam Emami ◽  
Seyed Mojtaba Hoseini
Keyword(s):  
Movement Time ◽  
Motor Task ◽  
Transfer Task ◽  
Female Students ◽  
Dominant Hand ◽  
Left Hand ◽  
Right Hand ◽  
Significant Difference ◽  
Post Test ◽  
The Right

ABSTRACT: The purpose of this study is to analyze the effect of practice orderwithdominant and non-dominant hand on acquisition, retention and transfer of basketball dribbling skills of female students at Ferdowsi University. The subjects were 20 female students of General Physical Education (19-24), who did not have any experiences in basketball with dominant right hand. They were randomly selected and equally assigned into two groups. The subjects practiced within the program for 4 weeks, 2 times a week and 45 minutes per session. Group A practiced with their dominant right hand for the first four sessions and then switched to their left hand for the second four sessions. Group B practiced reversely. The subjects were assessed by Slalom-Dribble-Test in pre-test and post-test. Retention and transfer tests were performed one week after the exercise was finished. The results showed that there was no significant difference between the two groups in acquisition of dribbling skill (p=0.053). Movement time has been significantly reduced from pre-test to post-test (p=0.00). The results showed better performance of the right hand compared to the left (p=0.042). Both groups had a shorter dribbling time with the right hand compared to the left hand in the post-test and retention test. There was no significant difference between two groups in transfer task (p = 0.16). The results indicate that practicing with dominant and non-dominant limbs in the initial motor learning seems to be important to improve performance of both limbs and to strengthen bilateral competence of the learners.

scholarly journals Effects of Congruency on Bereitschaftspotential While Performing a Bimanual Motor Task

2018 ◽  
Vol 9 (1) ◽  
pp. 63-79
Author(s):  
Meghan McGowan ◽  
Camille Hémond-Hill ◽  
Justine Nakazawa
Keyword(s):  
Reaction Time ◽  
Primary Motor Cortex ◽  
Brain Activity ◽  
Sensory Modality ◽  
Motor Task ◽  
Left Hand ◽  
Grand Average ◽  
Bimanual Task ◽  
Significant Difference ◽  
The Right

 The bereitschaftspotential (BP)—also known as the readiness potential—is a measure of brain activity that precedes voluntary movement by approximately one second in the supplementary motor area and the contralateral primary motor cortex. Motor task reaction time for bimanual task performance is affected by both the individual and the environment; however, it is unclear whether motor task reaction time (as measured via the BP) is significantly affected by congruency. A congruent motor task is an ipsilateral stimulus (e.g., a stimulus on the right is responded to by the right hand), and an incongruent task is a contralateral stimulus (e.g., a stimulus on the right is responded to by the left hand). Congruency is re-emerging as an important topic in motor learning as it may require different levels of cortical processing. The purpose of this study was to examine the effect of congruency on the BP. Participants were asked to complete the computer task, Keyboard Hero, where they pressed keys with both their left and right hands in response to discrete congruent and incongruent stimuli. A MUSE™  apparatus recorded brain activity 1000 ms prior to, and 1000 ms after each stimulus. Results from every participant for the incongruent and congruent trials were averaged and compared using a grand average waveform. Means of accuracy (how often participants pressed the key correctly) and BP for each condition were averaged and compared using a 95% Confidence Interval (CI). Across congruent and incongruent conditions, a non-significant difference (p > 0.05 ) was found in BP (p > 0.59 ), accuracy (p > 0.64 ), and BP within −200  ms to 200 ms (p > 0.31 ). BP and mean accuracy scores were not significantly different between congruent and incongruent conditions, which may be due to only minute differences in brain activity or due to the study’s design. Further research should analyze individual variations of the present study, such as stimulus location, differences in the responding limb, correctness of responses, and the sensory modality being tested

scholarly journals Are left- and right-eye pupil sizes always equal?

2019 ◽  
Vol 12 (2) ◽  
Author(s):  
Gonca Gokce Menekse Dalveren ◽  
Nergiz Ercil Cagiltay
Keyword(s):  
Cognitive Load ◽  
Movement Analysis ◽  
Difficulty Level ◽  
Human Beings ◽  
Left Hand ◽  
Surgical Residents ◽  
Right Hand ◽  
Significant Difference ◽  
Left And Right ◽  
The Right

Eye movements provide very critical information about the cognitive load and behaviors of human beings. Earlier studies report that under normal conditions, the left- and right-eye pupil sizes are equal. For this reason, most studies undertaking eye-movement analysis are conducted by only considering the pupil size of a single eye or taking the average size of both eye pupils. This study attempts to offer a better understanding concerning whether there are any differences between the left- and right-eye pupil sizes of the right-handed surgical residents while performing surgical tasks in a computer-based simulation environment under different conditions (left hand, right hand and both hands). According to the results, in many cases, the right-eye pupil sizes of the participants were larger than their left-eye pupil sizes while performing the tasks under right-hand and both-hands conditions. However, no significant difference was found in relation to the tasks performed under left-hand condition in all scenarios. These results are very critical to shed further light on the cognitive load of the surgical residents by analyzing their left-eye and right-eye pupil sizes. Further research is required to investigate the effect of the difficulty level of each scenario, its appropriateness with the skill level of the participants, and handedness on the differences between the left- and right-eye pupil sizes.

scholarly journals Studi Ergonomi tentang Keluhan-keluhan Fisik yang Dialami Karyawan di Unit Perpustakaan Fakultas Kedokteran Universitas Gadjah Mada Yogyakarta

2015 ◽  
Vol 10 (1) ◽  
pp. 22
Author(s):  
Heru Wibowo
Keyword(s):  
Quantitative Research ◽  
Mechanical Vibration ◽  
Left Knee ◽  
The Body ◽  
Upper Body ◽  
Left Shoulder ◽  
Research Approach ◽  
Left Hand ◽  
Left Elbow ◽  
The Right

In carrying out the activities at the library needed a comfort, safety and job security in order to create a condition that is in line with expectations and make history in enjoying what will be done. To create an environment and atmosphare is influenced by temperature, humidity, air circulation, lighting, mechanical vibration, color, ordor, and a number of tools used to support the activities of the library includes tables, ahairs, shelves, cabinets, atc. Furniture or equipment use in the library must also be designed so that a safe and compfortable when used. This study aims to determine the grievances suffered by employees (librarian. This study is a quantitative research approach to ergonomics so that the methods used include: (1) observation by direct observation, (2) interview were conducted using a questionnaire sheet Nordi Body Map and (3) documentation. The results obtained from this study: (1) in the upper body 70% complained of pain in the shoulders and neck, 50 % left shoulder , right shoulder 55 % , and 45 % on the left arm. (2) the body of the middle 60 % complained of back pain , 50 % in the upper right arm , 60 % pain in the waist , 20 % on the buttocks , 15 % on the buttocks , the left elbow 25 % , 20 % right elbow , 30 % below the left arm , forearm 25 % right, 35 % left wrist , right wrist 45 % , 30 % and 40 % left hand right hand. (3) in the lower body as much as 20 % complained of pain in the left thigh , right thigh 20 % , 30 % left knee , right knee 25 % , 35 % left calf , calf 35 % right, 20 % left ankle , 30 % on the right ankle , 20 % of the left leg and 25 % pain in the right foot . It can be concluded that most of the employees (librarians) complained of pain in the right side of the body member .

scholarly journals Effect of Handedness and Footedness on Some Motoric Characteristics in Amateur Soccer Players

2019 ◽  
Vol 7 (12) ◽  
pp. 13
Author(s):  
Deniz Özge Yüceloğlu Keskin ◽  
Osman İmamoğlu ◽  
Menderes Kabadayı
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
Hand Preference ◽  
Individual Characteristics ◽  
Soccer Players ◽  
Time Asymmetry ◽  
Left Hand ◽  
Significant Difference ◽  
The Right ◽  
Hands And Feet

The present study aims to compare the strength of right and left legs and reaction times of soccer players depending on their hand and foot preferences. The study included 92 volunteers chosen from amateur soccer players. The measurements conducted on the subjects were anthropometric characteristics, foot reaction times (sound, light) and right and left foot squat parameters. The t-test was used for statistical procedures. Among the amateur soccer players who participated in this study, it was found that 19.57% used left hand and 67.39% used right hand as preferred. Soccer players using both hands equally were found with a rate of 13.4%. In terms of foot preference, it was found that 22.83% of the participants used left foot and 43.48% of the participants used right foot as preferred. The soccer players using both feet equally was found as 33.70%. No significant difference was found between right handers and left handers in reaction time measurements when the soccer players were grouped by hand preference. When compared with left footed players (0.29 sec), only the right foot sound reaction time of right footed players was significantly shorter (0.21 sec) at p<. 05 level. Statistically significant correlation was found between soccer players’ hand and foot preference at a level of p< 0.01. Left footed players had significantly higher left leg mean squat (37.19 kg) when compared with right footed players (32.27 kg). No significant difference was found between right footed (35.36 kg) and left footed (33.98) subjects in terms of mean of right leg squat. Conclusion: According to the hand preference, the proportion of those who use equally two feet increased. Reaction times and force's squat of the dominant hands and feet were better. Training programs for soccer players planned according to individual characteristics including footedness may result in performance increase and decrease in injury as a result of reduced strength and reaction time asymmetry between legs and arms.

scholarly journals Does Performance of Speed-Accuracy Movements Depend on Gender and the Left or the Right Hand?

2018 ◽  
Vol 2 (77) ◽  
Author(s):  
Kristina Motiejūnaitė ◽  
Dalia Mickevičienė ◽  
Albertas Skurvydas ◽  
Diana Karanauskienė ◽  
Mantas Mickevičius
Keyword(s):  
Reaction Time ◽  
Movement Speed ◽  
Movement Trajectory ◽  
Dynamic Parameters ◽  
Left Hand ◽  
Right Hand ◽  
Significant Difference ◽  
Males And Females ◽  
The Right ◽  
Speed Accuracy

The aim of the study was to establish the differences in men and women’s performance of speed-accuracy movements with their left (LH) and right (RH) hands. The research participants were 24 healthy right-handed subjects: 12 males (aged 20.8 ± 1.1 years) and 12 females (aged 21.4 ± 1.0 years). The research was carried out in the Laboratory of Human Motor Control at the Lithuanian Academy of Physical Education (LAPE) applying the analyzer of dynamic parameters of human leg and arm movement (DPA-1; Patent No. 5251; 2005 08 25), which is used for the qualitative estimation of the dynamic parameters of one arm and leg target movement, two arms and legs coordinated and independent target movements, when the resistance power and target are coded with different programmable parameters. The task was performed with the right and then with the left hand (50 repetitions with each hand). The subjects had two tasks: a) to react as quickly as possible (simple task); b) to react as quickly as possible and to hit the target on a computer screen quickly and accurately (complicated task). We registered the maximal and mean movement speed, reaction time, movement trajectory and intraindividual variability of the right and the left hands. Conclusions. There was no significant difference in accuracy between female and male subjects, thought female subjects performed speed-accuracy task more slowly than men. Both males and females performed the speed-accuracy task with their right hand faster and more accurately than with their left hand. Performing movements with different hands the indices of reaction time did not differ significantly. Both males and females performed movements with their right and left hands with the same intraindividual variability.Keywords: movement control, reaction time, speed-accuracy task, right and left hand, gender. 

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