Impact of Lower Limb Strength Asymmetry on Performance and Injury Prevention in Pakistani Soccer Players

Abstract

This research was aimed at investigating how lower limb strength asymmetry affects soccer players, especially in their overall performance and the likelihood of injury. In soccer, soccer players are more likely to have stronger legs, and the leg that dominates is the one that is mostly used in technical activities like passing, dribbling, shooting, and kicking. Due to this fact, the dominant leg can be very strong compared to the non-dominant leg. This is instinctive, as the movements that are necessary in sport are repetitive. Nevertheless, in the case of a high level of strength disparity between two legs, it may cause a set of adverse outcomes for players. The strength disproportion between the non-dominant and dominant legs may be a hindrance to the performance of a player, whereby he/she may not perform the skills effectively. Such asymmetry may also interfere with neuromuscular efficiency, which results in reduced coordination and motor control during play. Besides this, the strength asymmetry of the lower limbs has been attributed to a higher risk of injury, especially non-contact injury such as strains and ligament tears. These injuries are also because the non-dominant leg is weaker and cannot withstand the pressure that it has been subjected to during high intensity things like sprints, sudden change of direction, or deceleration. In this case, the dominant and non-dominant leg strength of Pakistani elite male and female soccer players was measured. The findings showed that there is a high degree of asymmetry between the strength of the lower limbs of the players, where the dominant leg always performed better than the non-dominant one. Values of asymmetry above the 10-15 percent level were associated with performance losses as well as increased risk of injury. The paper ends with the recommendation that lower limb strength imbalance should be corrected by using specific training programs to minimize the risk of injuries and increase the performance of soccer players.