I only took light cuts, (& bearing in mind I still need to work on my technique), but it didn't actually need vast amounts of effort. The fact that tool has a minimal cutting tip possibly made it harder than it would be with a wider profile tip, as it had a tendency to try digging in, & anything more than a light cut, that tool can't manage. I was expecting my arm to feel dead by now, but it doesn't. Once you start getting a feel for it, it's surprisingly easy.