体操选手上场前为何要擦粉？（秒懂全运）

Core Viewpoint - The article discusses the significance of magnesium powder in gymnastics, explaining its role in enhancing grip and performance during competitions [1] Group 1: Importance of Magnesium Powder - Magnesium powder, chemically known as magnesium carbonate, is used by gymnasts to absorb sweat and increase friction with apparatus [1] - The application of magnesium powder is strategic, focusing on hands, feet, and areas of contact between hands and torso to aid in executing technical movements [1] - Gymnasts also apply magnesium powder on the competition apparatus, such as the horizontal bar, parallel bars, rings, and pommel horse, to ensure stability during contact [1] Group 2: Competition Preparation - Before the competition, gymnasts perform a series of preparations, including the application of magnesium powder [1] - Athletes wait at the starting position for the referee's signal to confirm readiness before the competition begins [1]