Does anyone know when the double-end bag was first invented? And also, what bags were used in the gyms circa 1915?
The earliest pics I've seen of someone working a double end bag is Robinson in the 50's (probably early 50's). The pics I've seen of workout bags in/around 1915 are heavy bags and speed bags that are almost as big as heavy bags... Enormous.
What about slip bags (maize bags)? Were they around then? I know they used mitts, heavy and speed bags. Do you know of anything else?
I have a pic of Marciano hitting the mitts, that's as early as I've seen the mitts. Don't know about the maize.