The Science Behind Why Soccer Players at the 2026 World Cup Are Cutting Their Socks

New Delhi, India Jul 6, 2026 ALN: During this year’s World Cup, one scene repeats itself game after game: Several players take the field with holes in the calves of their socks. Social media is rife with theories about the supposed competitive advantage this might give them. But the practice isn’t new. It has been seen at the European Championships, the Olympic Games, and other international competitions over the past decade. Still, science has yet to find evidence that it improves performance.

Professional soccer socks are, by design, form-fitting. In addition to holding shin guards in place, they provide support to the ankle, the arch of the foot, and the calf; they help manage moisture and reduce foot movement inside the cleat to improve stability. This design principle has been used in professional soccer for decades. Although materials have evolved to become lighter and more durable, they are still primarily based on synthetic fibers such as polyester, nylon, and spandex. These materials are selected for their ability to wick moisture away from the skin, provide elasticity, and withstand the rigors of repeated use on the field.

However, not all players find these socks comfortable. Quite a few players have complained that the socks are too tight and cause a tingling and numb sensation in the calf area. The discomfort is so great that, halfway through a game, they cut several holes in the calf area to “release tension” and run better. This raises questions about the balance between garment design and athlete comfort, especially in a sport where performance can hinge on minute details. The tightness of the socks is intended to enhance performance by providing compression, but for some players, it may have the opposite effect.

The biomechanical component of this sensation is crucial to understanding why some players resort to this practice. During a sprint or a change of direction, the largest muscle in the calf contracts and increases in thickness to generate the force that propels the athlete forward. This change in shape occurs thousands of times during a game. For some players, the repeated expansion of the muscle is enough to create a sensation of pressure when the sock exerts constant compression on the calf. This pressure can lead to discomfort, which, in turn, can affect performance. When discomfort arises, it can distract players from focusing on their game, potentially leading to decreased performance or increased risk of injury.

Over time, the practice of cutting holes in socks has taken on an almost intuitive explanation among the players themselves: splitting open the fabric allows the muscle to “breathe,” relieving pressure and reducing the likelihood of pain or cramps. However, specialists in sports medicine and recovery point out that there are no studies demonstrating that cutting holes in socks provides any benefit. In fact, much of the research on compression garments concludes that, when properly designed and fitted, they can help limit muscle inflammation after intense exertion. This indicates that while players may find temporary relief from discomfort, they might be compromising the intended benefits of the socks.

Despite the lack of evidence regarding physiological benefits, the practice continues to spread among professional soccer players. Today, it is considered primarily an anecdotal phenomenon, based on each player’s personal experience rather than scientific evidence. Furthermore, the rules of the game do not prohibit modifying socks, as long as the equipment remains safe and the shin guards remain properly covered. (A soccer player, however, cannot play with a torn jersey.) This flexibility in equipment regulation may contribute to the ongoing trend of sock modification. Players often seek ways to adapt their gear to maximize comfort and performance, and the modification of socks represents a personal solution to an individual problem.

Given the lack of scientific evidence, several specialists believe that part of the phenomenon could be explained by the player’s own perception of comfort. In high-performance sports, the feeling of comfort can influence the confidence with which an athlete competes. If a soccer player believes a piece of clothing is restrictive, eliminating that perceived discomfort can make them feel freer to run, accelerate, or change direction—even if their performance remains objectively unchanged. This psychological aspect of sports performance cannot be underestimated, as mental state often plays a critical role in an athlete's success. The belief that a modification enhances performance can be a powerful motivator, even in the absence of empirical support.

Though there is no evidence that cutting the socks provides a competitive advantage or reduces the risk of injury, that does not mean the sensation of discomfort is imaginary. The perception of pressure, restriction, or comfort depends on multiple factors, ranging from anatomy and individual sensitivity to the athlete’s past experiences. In other words, two players may react differently while wearing exactly the same equipment. This variability in human physiology and psychology adds complexity to the understanding of performance in sports. It highlights the importance of individualized approaches to sports gear, as what works for one athlete may not work for another.

For now, it seems the cutting of socks will continue. The available evidence points to a mechanism similar to that of other sports rituals: Its effect is primarily psychological, not necessarily physiological. This phenomenon is reminiscent of various superstitions and rituals that athletes engage in, from wearing lucky socks to performing specific pre-game routines. Such behaviors are often rooted in the desire for control over the unpredictable nature of competition. Athletes frequently seek ways to create a sense of normalcy and assurance in their performance, and modifying equipment can become part of that ritualistic approach.

Moreover, the trend of modifying socks can also be viewed through the lens of fashion and identity within the sport. Soccer players often use their appearance on the field to express individuality, and the act of cutting holes in socks can serve as a form of personal branding or a statement of rebellion against the norms of sports attire. This adds another layer of complexity to the practice, as it intertwines with broader cultural and social dynamics in sports. The visual impact of such modifications can also resonate with fans, creating a connection between players and supporters based on shared experiences and expressions of individuality.

In conclusion, while the act of cutting holes in soccer socks may not be backed by scientific evidence, it reflects a deeper interplay of comfort, psychology, and personal expression in the world of professional sports. As players continue to navigate the demands of high-performance athletics, their choices in equipment and attire will likely evolve, influenced by both personal preference and the ongoing discourse surrounding optimal performance. The phenomenon serves as a reminder of the complexities involved in athletic performance, where the intersection of physical capability and psychological comfort can significantly impact outcomes on the field.

This article originally appeared on en Español and has been translated from Spanish.