As someone who has cleared several acres of heavy tree growth... that's exactly how it works. While I agree that the impact on "sleepiness" doesn't need to be terribly pronounced, chopping down trees and then sawing logs out of them is exhausting work. It takes hours to saw a single tree into planks by hand, if not days. For the sake of gameplay I understand not making it take that long, but making balance heavy, exhausting labor with less labor intensive things (like training skill books, cooking, and looting) is something healthy and positive for the game imo. I do landscaping as a sidejob while I'm at Uni and I've chopped down my fair share of trees aswell, granted I didn't use an axe on a fully grown tree yet (addition of chainsaws for easy tree cutting into PZ, anyone?) and I agree it's pretty straining work to swing an axe, but in reality if you'd chop down a tree you wouldn't just get 3 planks per tree out of it and you can definitely chop down more than 2 trees without getting exhausted to a point that you can't stand anymore. Doesn't really matter as Lemmy already said it's a bug anyway, but I insist that it's not realistic to be dead tired and having to sleep after chopping down two trees. This is a bug if its the case. You might find the information that I've been using the right-click context menu action for chopping them down useful. Have not tried cutting them down manually yet, since right-click is faster. All in all I really like the concept of the new stamina system though. Edit: I also have a question regarind how getting tired while being exhausted works. Is it correct that you get sleepy faster when you are exhausted or were exhausted during the day? I also just tested chopping down trees manually in game and my suspicion was correct, the insane exertion only happens when using the right-click action. Chopping them down manually is fine.