This kind of white powder is called magnesium powder, and its chemical name is magnesium carbonate, because athletes will sweat or get rid of their hands because they are too slippery when doing actions on the equipment. Rub some magnesium powder on your hand, which can not only absorb moisture, but also increase the friction between your palm and the musical instrument. In this way, athletes will reduce mistakes and improve their performance. Therefore, athletes have the habit of rubbing magnesium powder with their palms when they go out.

Friction is an obstacle on the contact surface when objects in contact with each other have relative motion or relative motion tendency. The surface of horizontal bar, parallel bars, uneven bars and other instruments is smooth, but the smooth surface has little friction, and the hand is easy to slip off the barbell.

Magnesium carbonate filling palm lines can exert strength to a greater extent and improve players' performance. Moreover, in badminton court or tennis court, in order to prevent players from slipping in the game, magnesium carbonate will be coated under the court, which can increase the friction of the court and let the players play in a better state.

The moisture absorption of magnesium carbonate is a process of water absorption, and there is no obvious chemical interaction with water at room temperature. There are many substances with hygroscopic function, but the stronger the hygroscopicity, the better. Practice has proved that magnesium carbonate has the best hand feeling, moderate moisture absorption function, no damage to the skin, not only conducive to grasping the equipment, but also will not stick between the hand and the equipment when the athlete lets go. In addition, because the carbonic acid powder particles are very fine, it helps to fill the gap between the palm and the musical instrument, making the hand more powerful.