Well, I think their work axes are about 5 1/2 pounds,as opposed to a conventional axe that probably ranges from 3 to 4 pounds. But it can go higher to 7 1/2 pounds or more. These companies, and there are others, cater to custom orders and can shape it the way you want and get you the weight you need for the particular use, and the particular wood.
Handles can be had in a great variety of wood and even carbon fiber.
Expensive suckers, though. If you don't really know what you want or need, (and how could you really know if you aren't that experienced) you might look for a used or cheaper axe ( tat are expensive) and 5-6 pounds is quite an axe to use for chores or excercise.
But I'm no competitive chopper and I'll bet we have a few around here somewhere. Enjoy!