A punching bag is a cylindrical bag filled with materials like sand, foam, or air, designed for athletes to practice striking techniques. It is commonly used in martial arts, boxing, and fitness training to improve strength, speed, and coordination. Punching bags come in various sizes and weights, catering to different skill levels and training goals. These bags can be hung from a ceiling or mounted on a stand, allowing for versatile training options. Some punching bags are specifically designed for kickboxing or Muay Thai, featuring a longer shape to accommodate kicks. Regular use of a punching bag can enhance overall fitness and combat skills.