Videographical Analysis of Short Service in Badminton

The study aimed to explore the effect of elite tennis player body kinematics during preparatory, force generation and follow through phase (between first serve and second serve) at three different time periods i.e. initial, mid and end of the match. Four Indian International male tennis players were selected as subjects for the study. The mean and standard deviation of players of age (year), height (cm) and weight (kg) were 27.00 ± 4.97, 186.50 ± 6.03, 81.25 ±7.41, respectively. The tennis service was modeled as segments of the kinematics chain composed of body segments. 2D kinematics data of the body were obtained for this study with the high speed canon camcorder operating at the shutter speed of 1/2000 with a frame rate of 50 Hz. Descriptive statistics and t-test were performed by SPSS version 17.0 for all the variables under this study were computed at Level of significance for 0.05 with 6 degree of freedom. Results revealed that selected kinematics variables of selected subjects does not play significant role in first and second serve at different phases during three different stages of the Tennis match.

2015

Improving the serve speed is most important for competitive tennis players. The aim of this study was to examine the influence of body kinematics on ball velocity, thereby to propose possible suggestions to improve serving skill. Body kinematics of four Indian international players, who participated in Davis cup held at Indore, India having mean age (years), height (cm) and weight (kg) of 27.00±4.97, 186.50±6.03 and 81.25±7.41, respectively were investigated. The tennis serve was divided into three phases: (I) preparatory phase, (II) force-generation phase, and (III) follow-through phase. The recorded data of service motion was analyzed using appropriate motion analysis software and statistical analysis was done by using SPSSv 17. The mean, standard deviation (SD) and correlation coefficient (r) were determined to find out any relationship between the selected kinematic variables and ball velocity. It was shown that, during phase I, wrist angular velocity (r= 0.50), during phase II,...

International Journal of Sports Science & Coaching

Accuracy of a projectile is typically quantified as the proportion of successful target hits, or the distance an object finishes from the target. Serving in sports such as badminton differs since the shuttlecock is usually intercepted by the opponent before landing on the target (i.e. court surface). Therefore, landing accuracy measures are inappropriate and a new method of determining accuracy of the serve is needed. During interviews, elite coaches and players described an accurate short serve as crossing the net with low clearance and having an apex before the net. Three-dimensional trajectory of the shuttlecock was therefore tracked from eight national-level players who performed 30 short serves in simulated match conditions (i.e. with an opponent). 27% of all serves were classified as 'accurate', 27% of serves as 'inaccurate', 21% with a 'good apex' position, and 25% with a 'good clearance' height. The proposed method of assessing shuttlecock trajectory as a measure of accuracy could be adopted by coaches and players to assess and improve short serve accuracy. Furthermore, this method is more representative of a match environment since the shuttlecock rarely lands because the opponent returns the serve.

British Journal of Sports Medicine, 2003

Objective: To describe the characteristics of badminton in order to determine the energy requirements, temporal structure, and movements in the game that indicate performance level. To use the findings to plan training with greater precision. Methods: Eleven badminton players (mean (SD) age 21.8 (3.26) years) with international experience from four different countries (France, Italy, Spain, and Portugal) were studied. Two of the Spanish players were monitored in several matches, giving a total of 14 samples, all during the 1999 Spanish International Tournament. Blood lactate concentration was measured with a reflective photometer. Maximum and average heart rates were recorded with a heart rate monitor. Temporal structure and actions during the matches were determined from video recordings. All variables were measured during and after the game and later analysed using a descriptive study. Results: The results confirmed the high demands of the sport, with a maximum heart rate of 190.5 beats/min and an average of 173.5 beats/min during matches over 28 minutes long and performance intervals of 6.4 seconds and rest time of 12.9 seconds between exchanges. Conclusions: The results suggest that badminton is characterised by repetitive efforts of alactic nature and great intensity which are continuously performed throughout the match. An awareness of these characteristics, together with data on the correlations between certain actions such as unforced errors and winning shots and the final result of the match, will aid in more appropriate planning and monitoring of specific training.

Applied Sciences

The forehand jump smash is an essential attacking stroke within a badminton player’s repertoire. A key determinate of the stroke’s effectiveness is post-impact shuttlecock speed, and therefore awareness of critical technique factors that impact upon speed is important to players/coaches. Three-dimensional kinematic data of player, racket and shuttlecock were recorded for 18 experienced players performing maximal effort forehand jump smashes. Joint angles and X-factor (transverse plane pelvis-thorax separation) were calculated at key instants: preparation, end of retraction, racket lowest point, turning point and shuttlecock contact. Peak shoulder, elbow, and wrist joint centre linear velocities, phase durations and jump height were also calculated. Correlational analyses were performed with post-impact shuttlecock speed, revealing significant correlations to peak wrist joint centre linear velocity (r = 0.767), acceleration phase duration (r = −0.543), shoulder internal/external rota...

Journal of Education and Practice, 2011

The aim of the present study was to establish a relationship between selected variables of physical characteristics and the level of performance of male badminton players. 20 male badminton players who represented State Badminton Championship were selected as the subjects for the study. The age of the selected subjects were ranged from 20 to 27 years of age. Arm strength, leg strength, agility, spine flexibility and wrist flexibility were taken as the variables of physical characteristics. Level of performance was recognized as the playing ability of the players. Rogers's formula was employed to estimate the arm strength of the selected subjects. Leg Strength of the subjects was taken by leg dynamometer to the nearest kilogram. To measure the agility of the subjects 4×10 yards shuttle run was administered and time was recorded to the nearest 1/10 th of a second. Spine and wrist flexibility of the subjects was taken by flexomeasure with yard stick and it was recorded to the nearest inches. For determining the level of performance of the players they were asked to participate in a series of three matches, seven points each. The fixture of the matches was drawn on the basis of lottery system. The level of badminton performers were categorized on the basis of players' performance which was evaluated and rated by a panel of three experts on the court during the matches on a 10 points likert type rating scale having score from 1 to 10 points. Some more addition points were awarded according to the results of the matches i.e. 5 points for winning and 2 points for losing the match. The Person's Product Moment Coefficient of correlation was computed to determine the relationship between badminton performance and selected variables of physical characteristics. The results of this study indicated that there is a significant relationship between agility and wrist flexibility a variable of physical characteristics and level of performance where as an in significant relationship were observed between arm length, leg length and spine flexibility the variables of physical characteristics and level of performance at 0.05 level of confidence. The finding indicates that agility and flexibility of wrist of the subjects were important variables for better performance in Badminton.

Sports Biomechanics, 2021

Badminton is the fastest racket sport in the world with smash speeds reaching over 111 m/s (400 kph). This study examined the forehand jump smash in badminton using synchronised force plates and full-body motion capture to quantify contributions to shuttlecock speed through correlations. Nineteen elite male Malaysian badminton players were recorded performing forehand jump smashes with the fastest, most accurate jump smash from each player analysed. The fastest smash by each participant was on average 97 m/s with a peak of 105 m/s. A correlational analysis revealed that a faster smash speed was characterised by a more internally rotated shoulder, a less elevated shoulder, and less extended elbow at contact. The positioning of the arm at contact appears to be critical in developing greater shuttlecock smash speeds. Vertical ground reaction force and rate of force development were not correlated with shuttlecock speed, and further investigation is required as to their importance for performance of the jump smash e.g. greater jump height and shuttle angle. It is recommended that players / coaches focus on not over-extending the elbow or excessively elevating the upper arm at contact when trying to maximise smash speed.

2019

The purpose of this study is to research the effects of 12-week footwork badminton trainings on strength and agility parameters of 8-10 age groups of children. Subjects of the research group have been divided into 3 groups as footwork badminton training group (BF, n=17 boys-18 girls), classical badminton training group (BC, n=19 boys-15 girls) and control group (CG, n=15 boys-17 girls), and it has been carried out on 101 subjects. BF and BC groups were trained 4 days a week for 16 weeks and as preparation and basic trainings period. After 4 weeks of preparation works, preliminary tests of all groups were carried out. After the preliminary tests, subjects of BC training group were applied classical badminton training program 4 days a week for 12 weeks, subjects of BF training group were applied 2 days classical badminton training and 2 days shadow badminton trainings in a week as during 12 weeks and 4-day training in a week. After 8 weeks, mid-term tests and after 12 weeks final test...

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