What is the tolerance for the extension of the head of the bench in centimeters?

The tolerance for the extension of the head of the bench in powerlifting is set at 5 cm. This standard is established to ensure consistency and fairness during competition. The 5 cm allowance provides enough flexibility for different lifters’ biomechanics while maintaining the integrity of the lift being performed. A bench head that extends beyond this limit may affect the range of motion or the lifter's position, which could lead to an unfair advantage or disadvantage. This specific measurement is crucial for maintaining the standardized regulations set forth by the International Powerlifting Federation, enabling all competitors to perform under the same conditions.