A heavy bag is a large, cylindrical bag filled with materials like sand or water, used for training in various combat sports such as boxing and kickboxing. It is designed to withstand powerful strikes, helping athletes improve their punching and kicking techniques, as well as build strength and endurance. Heavy bags come in different weights and sizes to accommodate various training needs. Typically hung from a ceiling or mounted on a stand, the heavy bag allows fighters to practice their skills in a controlled environment. Regular use of a heavy bag can enhance coordination, speed, and overall fitness, making it a popular training tool among both beginners and experienced athletes in the world of martial arts.