
Badminton players often face the issue of their racket strings moving or breaking. This can be due to several factors, such as string tension, hitting power, and string texture. Slicing the shuttle during a smash can also cause the strings to move. Strings with lower tension or slippery textures are more prone to slipping and sliding. The frequency of restringing and the starting tension also play a role in string movement. Additionally, there are weak spots on the frame where strings are more susceptible to breakage. While it can be frustrating, string breakage can occur even with the best equipment and stringers.
| Characteristics | Values |
|---|---|
| Tension | High tension may cause strings to move |
| Type of shuttlecock | Plastic shuttlecocks may cause strings to move |
| String texture | Sticky or smooth textures may affect string movement |
| Grommets | Improperly replaced grommets may cause string movement |
| Hitting style | Slicing shots may cause strings to move |
| String durability | Lower-durability strings may move more |
| String tension reduction | Strings may move if tension reduces over time |
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What You'll Learn

The impact of shuttlecocks hitting the strings at high speed
The choice of shuttlecock also plays a role. Feathered shuttlecocks, for instance, are preferred by experienced players as they can be hit at higher speeds without exiting the court, giving their opponents less time to react. The feathers create an asymmetrical shape, resulting in a natural counterclockwise spin that stabilizes the shuttlecock during flight. This spin, combined with the racquet's slicing action, significantly influences the shuttlecock's trajectory when hit at high speeds. The skirt deforms, increasing drag and resulting in a shorter distance travelled.
The unique design of the shuttlecock also contributes to its behaviour during impact. Its conical shape and non-homogeneous mass distribution, with the denser cork at the front, cause it to flip upon impact, always flying cork-first. This flipping motion, along with the shuttlecock's large drag, results in a nearly triangular trajectory. The impact dynamics and the subsequent oscillations of the shuttlecock's axis further influence its flight path.
Additionally, the speed at which the shuttlecock is hit can affect its spin and drag characteristics. Until a certain speed threshold is reached, the spin of the shuttlecock primarily stabilizes it. However, once the speed exceeds this threshold, the centrifugal force exerted on the shuttlecock pushes the "skirt" outwards, increasing drag and leading to faster deceleration. This interaction between the shuttlecock's spin, speed, and aerodynamics results in a dynamic and complex flight path.
To mitigate the movement of strings, players can consider adjusting their string tension, restringing their rackets more frequently, or choosing different string textures. However, it is important to note that string movement is a natural occurrence in badminton, and even professional stringers may experience string slippage over time.
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The type of string used
The durability of the string is also a factor. Some strings, such as BG65Ti, are more durable than others and can withstand more tension. BG80, for example, is a thinner gauge string with more bite, resulting in less movement.
The type of shuttlecock used can also affect string movement. Plastic shuttles are harder on the strings and can cause them to move or break more easily. This is especially true if the tension of the strings is on the lower end.
It's worth noting that string tension will reduce over time, and the rate of reduction depends on the starting tension and the type of string. Therefore, it is recommended to restring rackets regularly, especially if you are using a smoother string that starts to move after a few training sessions.
Additionally, the consistency of the stringer's technique can also impact string movement. It is important to ensure that the stringer is replacing grommets in key positions rather than simply turning them.
In conclusion, the type of string, its texture, and its durability all play a role in how much movement occurs. Other factors, such as the shuttlecock and the stringer's technique, can also contribute to string movement. Regular maintenance and adjustments can help mitigate these issues and ensure optimal performance.
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The tension of the strings
String tension also depends on personal preference and playing style. Advanced players might opt for higher tensions, such as 28 lbs or more, but this requires more frequent restringing to maintain homogeneous tension. Lower tensions, on the other hand, may be more suitable for players who prefer a longer-lasting string setup, but even then, restringing is recommended at least once or twice a month to maintain optimal performance.
The choice of stringer is also important. Some stringers might not replace grommets in key positions, opting to turn them instead, which can affect the consistency of string tension. Additionally, the stringing technique itself can impact tension. For instance, Yonex recommends stringing with 1 kg more on the crosses (a 10% increase) to reduce string movement, but not all stringers follow this advice.
It's worth noting that string tension will naturally reduce over time, and certain strings are more prone to movement than others due to their texture. Smoother strings tend to move more after a few training sessions, while sticky or grippy strings like BG80 can provide more grip and reduce string slippage.
Finally, the way you hit the shuttle can influence string movement. Slicing your shots or hitting with a slice action can cause the strings to move out of line, reducing power and accuracy. Therefore, it's essential to find the right balance between tension, string type, and playing style to minimize string movement and optimize performance.
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The technique of the player
It is observed that badminton strings tend to move when players smash or make hard hits. This movement can occur even if the strings are tightened to a certain tension, such as 28 lbs or higher. The act of slicing during a smash can cause the strings to move, and it is recommended to focus on hitting the shuttle directly to mitigate this issue.
The choice of shuttlecocks can also impact string movement. Plastic shuttles, for instance, are considered harder on the strings and can contribute to their movement or breakage. Feathers are an alternative option, and some players prefer using them with specific string types, such as BG80.
The tension of the strings plays a significant role in their movement. Lower tensions, such as 23 lbs, are more likely to result in string movement, especially when combined with a slicing action. Higher tensions, like 28 lbs or more, are recommended for advanced players, but they require more frequent restringing to maintain optimal performance.
Additionally, the texture of the strings should be considered. Smoother strings tend to start moving after a few training sessions, while sticky or grippy strings, such as BG80, may provide better grip and reduce string movement. The type of string used, such as BG65 or BG80, can also impact movement, with thinner gauge strings like BG80 offering less movement.
It is worth noting that string movement and breakage can occur even with the best equipment and stringers due to the intense nature of the sport. However, players should be mindful of their technique, equipment choices, and maintenance routines to minimise string-related issues and optimise their performance on the court.
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The grommets not being replaced
Grommets are the protective tubes around the strings near the edge of the badminton racket's frame. They protect the strings from the frame and vice versa. Over time, grommets can break due to natural use, especially if they are old or brittle. When a grommet breaks, a piece of it can get removed, creating a sharp edge that can rub against the string and cause it to break more quickly.
If grommets are not replaced when they break, the strings are left vulnerable to being cut by the frame or the sharp edges in the string holes. This can cause the strings to move more and become misaligned, affecting the player's power, control, and accuracy. Additionally, broken grommets can lead to string breakage, especially if the strings are thin or the player frequently misses the sweet spot.
It is recommended to check the grommets before each game and ensure they are in good shape. If any are broken or damaged, it is important to replace them to maintain the integrity of the strings and the racket's performance. Replacing grommets can be done by the player using a grommet box or with the help of a local stringer.
While some sources mention the impact of grommets on string movement, it is important to note that other factors also contribute to string movement. These include string tension, hitting power, string texture, and the type of shuttlecock used. Higher string tensions may require more frequent restringing, and smoother strings may start to move after a few training sessions. Additionally, using plastic shuttles can be hard on the strings and contribute to their movement.
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Frequently asked questions
This could be due to several reasons. Firstly, it is normal for strings to move slightly, especially with frequent use, hard hits, or when hitting the shuttle directly between two strings. Strings with lower tension or slippery textures may also move more easily. Additionally, the tension of the strings can decrease over time, affecting their movement.
You can consider increasing the tension of your strings, especially if they have low tension. However, higher tension may require more frequent restringing due to breakage. Alternatively, you can try using different types of strings with less slippery textures, as some strings are designed to be grippier.
You can use a string tension testing app or feel the strings to gauge the tension. Higher tension strings will have less give when pressed. Additionally, the sound of the strings when struck can indicate their tension level.
The frequency of restringing depends on factors such as the initial tension, the quality of the restring, and the frequency of play. On average, the tension can drop by 1-3 lbs within the first week after restringing and will continue to decrease over time. Advanced players with higher string tensions may need to restring more frequently due to the smaller sweet spot and increased risk of breakage.








































