Heavy punching bags are large, weighted bags used in boxing and martial arts training. They are designed to absorb powerful strikes, helping athletes improve their strength, technique, and endurance. Typically filled with materials like sand, water, or foam, these bags come in various weights, usually ranging from 70 to 150 pounds. These bags can be hung from a ceiling or mounted on a stand, allowing for versatile training options. Heavy punching bags are essential for developing skills such as punching power, footwork, and timing. They are commonly found in gyms and home workout spaces, catering to both beginners and experienced fighters.