MYOFASCIAL RELEASE AND SUPERFICIAL BACKLINE STRETCHING ON HAMSTRING STRAIN IN CRICKET PLAYERS: AN INTERVENTIONAL STUDY

Background: Hamstring Strain is common among athletes which lead to development of injury. Superficial Backline stretching for improving range of motion and flexibility. Using Tennis ball is a form of self-myofascial release results in increasing range of motion. Literature lacks studies done on self- myofascial release and superficial backline stretching. Hence my intention towards this study in comparison to find out the effect of Self Myofascial Release using tennis ball and superficial backline stretching on hamstring strain in cricket players. Methodology: A total of 24 subjects who were between the age group of 15 -19 years were conveniently allocated based on the inclusion criteria. Subjects received self-myofascial release using tennis ball 60 sec with 3-4 repetitions and 1 min interval of rest between sessions and superficial backline stretching with different poses for 2-3 repetitions and then compared FMS score of all subjects pre and post intervention after giving the superficial backline stretches and myofascial release to all the subjects. Outcome measure: Functional movement screen (FMS) Results: The result shows that there is a significant difference in pre and post Score of FMS, pre-FMS score is 15.9167±2.60295 and post score increased to 19.2500±1.59483which shows thatthere is statistical and clinical difference between the pre and post intervention. Functional movement is measured as the primary outcome measure.There is an average improvement of 3.333 with t value 12.487 and p <0.05. Conclusion: The aim of the study was to compare and find out the effect of Self Myofascial Release using tennis ball and superficial backline stretching on hamstring strain in cricket players., the result showed that there is statistically significant self-myofascial release using tennis ball and superficial backline stretching.

The relationship of some physical variables and performance angles to the strength of the straight serve for junior tennis

The problem of the research in determining the appropriate angles in the strength of serve for tennis age (14-16) year according to the specific biomechanical conditions, and the extent of the relationship of each variable of the physical variables in the successful performance of the skill of serve, and achieving the strength of transmission for tennis age (14-16) year, and it is one of the biomechanical principles that can be used in evaluating the angles of body parts. age (14-16) year tennis players. The aim of the research is to identify the percentage of the contribution of some physical variables of the straight serve for tennis juniors, and the percentage of the contribution of some corners of the body to the strength of serve for the tennis age (14-16) year (18) players. The two researchers reached a number of results, the most important of which are: There is a statistically significant correlation between some physical abilities and body angles with the straight serve for tennis players. The lower the angles (elbow, shoulder, knee for the front leg) at the moment of hitting the tennis ball, the stronger the serve will be. Correlation relationship with some biomechanical variables, because the skill of serve requires the strength of the striking arm during the performance of the straight serve

The Effect of Wood Type on the Reflection of a Table Tennis Ball

The table tennis game table can be made of any material with certain bounce height requirements according to ITTF regulations. Wood as the main material for the table is found in Indonesia. Various types of wood have the potential to be a dining table material. This study was conducted to determine the effect of the type of wood on the bounce of a table tennis ball. Experiments were carried out on 9 types of wood, namely hardwoods (teak, sono, coconut), medium hardwoods (meranti, plywood and jackfruit) and soft woods (waru, randu and sengon). The height of the falling ball is determined to be 30 cm for the ball's bounce recorded by the camera. The ball used is a ball with a weight of 24 grams and 30 grams. Camera recording data is processed with Kinovea 08.15 to get the reflection height. The bounce height is used as a reference for ITTF standard compliance. The initial height and reflection height were then used to calculate the coefficient of restitution (COR). Data collection was carried out 5 times and the average value was calculated. The level of wood hardness is influenced by its specific gravity. Hard wood has a relatively high specific gravity. Teak wood which is relatively hard has a specific gravity value of 0.59 – 0.82 gr/cm3

Dynamics of a bouncing table tennis ball from the acoustic signature using an optical fibre sensor

We describe an optical fibre-based method to estimate impact force and collision duration using time measurements recorded from acoustic signals of a table tennis ball bouncing on a table. The technique combines measurements obtained from a polarisation dependent optical fibre sensor with graphical analysis and kinetics through numerical calculations. The presented coefficient of restitution, collision time, impact force, and elastic deformation during each bounce of the table tennis ball were obtained using corresponding time series measurements and numerical analysis. A peak impact force of 38.4N was estimated for a ball of mass 2.83g and 39.7mm diameter dropped from a height of 31.5cm. The impact duration for the associated bounce was 0.68ms with a centre of gravity shift of 0.40mm and coefficient of restitution of 0.88. While the observed results are unique to the ball and table surface, the approach is an attempt to fully quantify collision parameters from basic measurement and instrumentation applicable to undergraduate students. The sensor developed in this paper finds application in sports performance monitoring, infrastructural health early warning systems and pressure sensitive manufacturing processes.

Examining of the Effects of Target-Oriented Circular Training on Biomotor Features by using Tennis Ball Throwing Machine at 12-14 Age Tennis Performance Sportsmen for 10 weeks

Aim: In this work, it is aimed that examining the effects of target-oriented circular training on biomotoric features by using a tennis ball throwing machine at 12-14 age tennis performance sportsmen for ten weeks. Method: This research was implemented on sixteen active licensed athletes who played tennis for at least four years in Ankara. The athletes were randomly divided into two separate groups as the experimental group (n=8) and the control group (n=8). After measuring the height, weight, and fat rate of the athletes, biometric tests were started. Flamingo balance, sit-reach, reaction time, five meters and twenty meters sprints, T-test, and standing long jump tests were performed, respectively. Athletes were get heated for ten minutes before the tests and they were given a trying chance. The best scores were recorded by repeating each test twice. In the statistical analysis of the collected data, IBM SPSS 19 package program was used. In repeated measurements, the results were compared by two-way ANOVA with intergroup, intragroup and post-training data. Results: As a result, between the experimental group and control group data; on averages of T-Test (p<0.139), visual reaction (p<0.001), Flexibility (p<0.024), Vertical Jump (p<0.022), Flamingo Balance right foot (p<0.046) and left foot (p<0.045) statistical significance was confirmed. Keywords: Biomotoric features, ITN test, Tennis, Tennis ball machine

Some problems of the projectile motion with a square-law resistance

The influence of the force of the quadratic resistance of the medium on the change in some interesting characteristics of the motion of the projectile, which take place when the projectile moves in vacuum, is investigated. Loci are constructed numerically (and partly analytically) that ensures maximization of the arc length of the projectile trajectory and a non-decreasing of the length of the radius-vector. As examples, the motion of a baseball, a tennis ball and a badminton shuttlecock is studied.

Kinematic Effects of the Target on the Velocity of Taekwon-Do Roundhouse Kicks

The phenomena of target kinematic effects under different striking conditions and applying different techniques constitute one of the fields of research for sports biomechanics. However, the influence of some kinematic variables which change under different strike conditions for specific parts of the lower limb remains unknown. The aim of this study was to extend the knowledge on how targets of different shapes or the lack of a physical target would affect maximal velocity registered by a marker placed on the foot, knee and hip during the execution of a roundhouse kick. In total, 15 adult males were included in this study. All participants were taekwon-do elite athletes. The displacement of markers placed on the lateral side of the foot, knee and hip during movement execution was registered by a stereophotogrammetry apparatus. Participants performed taekwon-do roundhouse kicks for three target types (into the air, a table tennis ball and a training shield) applying either a sport or a traditional style. The highest maximal velocity was obtained for kicking into the training shield. When applying the sport style, the highest maximal velocity of foot markers for the executed kicks was registered. Kicking into air resulted in higher velocities for proximal body parts than kicking into a tennis ball, but the effect was reversed for the foot marker. In conclusion, a large resistance target is suitable for athletes’ motor preparation as it allows the highest maximum velocity to be reached. Small non-resistant targets are recommended for technical training.

Developing Basic Movement Skills in Primary School Students: Planned Games and Movement Education Applications

Aim: The aim of this study is to develop the movement skills of primary school students (1st and 2nd grades) in Erzurum city center with planned games and movement education applications. Method: 38 students (24 males + 14 females) living in the central campus of Erzurum province and selected according to the convenience sampling method, one of the purposeful sampling methods, participated in the research. Students participated in specially prepared game and movement training programs between 60-90 minutes 3 days a week during the summer period. In the first stage of the study, basic skills were determined by applying basic skill tests which is flamingo balance, catching the thrown ball, standing long jump, throwing a tennis ball, running 20 meters straight, hitting the ball with the foot, vertical jumping and galloping as a pre-test. At the end of the 2-month (8 weeks) period, basic skill tests were applied as a post-test and their status was compared. Findings: According to the results of the research, a positive (p<0.05) improvement was observed in the initial basic skill tests which applied flamingo balance, catching the thrown ball, standing long jump, throwing a tennis ball, running 20 metetraight, hitting the ball with the foot, vertical jump and gallop. Result: As a result, it was concluded that the game and special movement training program, which is made regularly for primary school 1st and 2nd grade students, contributes positively to their basic motor skills. Key Words: Primary school, games, movement training, skill development.