Re: Speed Bag Usefulness
A speed bag isn't totally useless, but in orders of magnitude and your endurance being in limited supply? It is so low on the list that unless you are in Olympic/pro shape and in the gym so much that you learn to use it just to use it and you are there? It is generally useless.
You "could" improve arm endurance using it, but why not a heavy bag? You "could" improve timing with it, but why not use a double end bag? You "could" improve rhythm with it, but why not just skip rope with that emphasis?
It is just a redundant tool.