I regularly use a machete to clear brush. I must be using the wrong technique for the tool ... or the wrong tool given my technique. In order to maximize the speed of the blade, I rotate my wrist forward before it strikes wood. This causes the pommel to dig into the lunar pad (bottom face opposite the thumb) and quickly blister it.
Is there a better tool for cutting brush, or maybe just a better grip, given my hand size and strength?
Amendment: If I don't break my wrist it feels like I'm "hacking" with too light of a tool. Blade speed is much lower, and so much less work is done with each stroke. If I were to not break my wrist I could use a much heavier tool: A much longer blade, or a blade at the end of a long handle, which would give the same blade speed and power per stroke without having to break my wrist. But what am I describing? A pike? (And then there's the question of what to do when I have to pack the tool into the wilderness....)
Second Amendment: I also realized that if I don't break my wrist I can't reach a lot of brush: If I keep the blade at a right angle to my arm then I have to bend to hit anything lower than 3 feet off the ground, and I have to wade further into the brush to reach more central branches, which is an often thorny proposition!