When playing football, it is best to do warm-up exercises first, so that our knees can be well adapted, and it can also prevent the muscles under the knees from suddenly moving and causing strain. Therefore, in the process of playing football, you can put sponge pads on your knees or tie professional knee pads. Never tie those hard things to your knees for protection. If you accidentally touch the ground while playing football, if the knee pads on your knees are hard and the force and force are equal, then your knees will be hurt more than when you don't have them, because hard knee pads will also cause damage to your knees. So it's best to protect your knees with sponges and cotton cloth. This can prevent the scratch between the knee and the ground, and can also prevent the injury of the knee hitting the ground after others trip over themselves. You'd better put on your sneakers before playing football. Sports shoes are specially designed for playing football to better prevent slipping and falling. Different from other ordinary sports shoes, shoes are flat shoes, which are easy to slip, and can also prevent unnecessary falls and protect knees.