Comparison of Handgrip Strength Between Right-Handed and Left-Handed Badminton Players
Badminton is a popular sport worldwide that requires fast and powerful shots and agile footwork. It is one of the fastest racket sports in the world; the speed of badminton smashes can be as high as 493kph. The badminton shots can be played both on the forehand and backhand sides and drop shot, slow drop shot & fast drop shots require good wrist control. Badminton wrist action is extremely important in producing powerful Shot. Good wrist movement maximizes power and improves control over the direction of the shuttle. Badminton is all about the wrist and the true power from any badminton shot comes from a combination of your wrist action and the racket swing. The flicking of the wrist with a ‘fast snapping motion’ to create extra power in your badminton shotsis essential to generate the maximum power in any type of shots. It very useful to train the players to improve their wrist action to generate the snapping motion of your wrist and badminton backhand, overhead stroke depends on strong wrist action to generate the power. 
Badminton strokes are performed by holding the racket while the wrist is in different degrees of orientation and depending on the strokes and type of shot being hit by players and they have to manage grip force and racket control while hitting the shuttlecock. Grip forces exerted by fingers flexor muscle are isometric and accordingly to the force-length relationship a badminton player should hit the shuttlecock. Badminton wrist action is extremely important in producing powerful shots. Good wrist movement maximizes power and improves control over the direction of the shuttle. 
Motor skills can be defined as an activity or task that has a specific purpose or goal to achieve. One of the motor skills in racquet sports is hand grip strength. This handgrip strength requires flexor musculature of the forearm and also hand. These motor skills play as a key role in injury prevention and overall strength development. Sakurai 2000 reported that the proximal muscles of the unskilled participant had a similar pattern of activity to that of the skilled player. It is reported that controlling the distal muscles appears to be important for achieving the accurate performance of the smash in badminton.  The research data of rankings and handedness stats for the top 100 players in six sports over multiple seasons, and combined these with video analysis of professional matchesLeft-handed athletes do better in sports and Left-handed athletes do better in sports like squash, badminton, and tennis. 
Badminton manufacturers are to producing the rackets for left-handed players with a special grip made only for left-handed badminton players. Strengthening the handgrip muscles will increase the overall strength which in turn will increase your badminton smash. There are a lot of anthropometric and hand grip strength studies comparing the hand dominance in sports activities. Many researchers have evaluated on the gross anthropometrics measurement such as BMI, arm circumference, skin folds, arm length and comparison of muscle strength, pattern of movements between hand dominance in sports. So this study is designed to compare the hand grip strength difference between right-handed and left-handed badminton players.
Aim of the study
Aim: To compare the handgrip strength between right-handed and left-handed badminton players.
- To assess the forehand smash of both right-handed and left-handed badminton players
- To assess the hand grip strength of both right-handed and left-handed badminton players using hand held dynamometer
- To compare the hand grip strength between right-handed players and left-handed badminton players
Badminton sports club in and around Navi-Mumbai.
- Male badminton players
- Age group 18-25
- Playing for at least 2 years
- Novice players [Played for less than 2 years]
- Any recent upper limb injuries or lower limb joints
- Recent wrist fractures
- Elite players
The ethical clearance was obtained from the ethical committee of DY Patil college of Physiotherapy. Badminton players were assessed for their eligibility. If the subjects fulfilled the inclusion and exclusion criteria, an information sheet providing details about the study was provided to them. For subjects who were willing to take part in the study, informed consent was obtained from them for the same. Prior to the assessment of BMI, a number of years of playing experience and demographic data were collected. All subjects were assessed for their handgrip strength using a hand-held dynamometer. Three trails were given for each of the participants and an average score was recorded. The subject was made to sit on a chair with the elbow flexed at 90 degrees and the forearm in semi-pronation (neutral position) lying on an armrest. There was a one minute resting period was given in between each squeeze in order to overcome the fatigue. The mean value of three squeezes was recorded.
After recording the handgrip strength, thirty minutes of rest was given before assessing forehand smash speed.
The procedure of forehand smash speed: The players were asked to perform forearm smash and the smash speed was recorded using the Ling Bu app. The best of three attempts forehand smash speed was recorded. The data obtained were analyzed to compare the hand grip strength between right-handed players versus left-handed badminton players. The main aim of this study was to compare thehandgrip strength and forehand smash speed performance among right-handed and left-handed badminton players. Our result indicates that there is significant between handgrip of right-handed and left-handed players also forearm smash speed with handgrip strength. There was a correlation between the number of years of practice and forearm smash speed.
The result of our study has shown an interesting pattern of the contribution of handgrip strength with a forehand smash. The left-handed player handgrip strength has shown the greater value than the right-handed badminton players with mean of 69 ± 9. 44 kgs and 58 ± 12. 02 kgs and the forearm smash speed was shown significantly higher scores of left-handed players than the right-handed badminton players with 196 ± 29. 15 and 166±25. 53 km/hr.
Measurement of hand grip strength is not only the most common assessment method for upper extremity muscle strength, but also it is an important indicator of sports performance. Hand grip strength is heritable, indicative of health status, overall masculinity, and reproductive fitness with a substantial genetic component. Grip strength has long been thought of as a possible predictor of overall body strength.  Smith 2005 found a direct correlation in grip strength and overall body strength. So, an increase in handgrip strength determines the physical strength of an individual and this can be applied in racket sports performance. Geschwind 1987 explained that the left-handers have an enlarged brain region in the right hemisphere during development which favours them playing better than the right-handed players.  Rossi1986, Bisiacchi 1985 reported that the performing activities which demand spatial task and attention, the right half of the brain is neuroanatomically highly suitable for the left-handers. [13, 14, 15] Further analysis has shown the significant correlation between handgrip strength and forearm smash speed in both the handed players with p = 0. 004 and r =0. 932. There is no significant correlation of age with handgrip strength (p=0. 31) and forearm smash speed (p=0. 61).
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