What is another word for punching ball?
Pronunciation: [pˈʌnt͡ʃɪŋ bˈɔːl] (IPA) 
A punching ball is a type of exercise equipment that helps build your endurance and improve your punching technique. It's also known as a speed bag, punching bag, or heavy bag. Speed bag refers to a small bag, often attached to a platform, that fighters use to improve their hand-eye coordination and quick reflexes. A punching bag, on the other hand, is a large, cylindrical bag filled with sand or other heavy materials that fighters punch and kick to improve muscle tone and endurance. A heavy bag is essentially the same as a punching bag, except that it's usually larger and heavier. It's often used for power punches and kicks.
