What Is in the Punching Bag? A Look at Common Fillers
If you've ever landed a solid hook and wondered exactly what is in the punching bag making it feel that way, you're definitely not the only one. Most people start their boxing journey hitting a bag at the gym without ever giving a second thought to what's hidden behind that leather or vinyl exterior. But as soon as you start thinking about buying one for your garage or basement, that "inner mystery" becomes a lot more important. The stuff inside determines how the bag swings, how much it hurts your knuckles, and how long your joints will last before they start screaming at you. ...