My airbnb is the lower floor of my house, with its own separate entrance through the garage. The garage is a shared space, but the rest of the guest suite is private. I keep my treadmill in the garage for my own personal use - I only use it when I don’t have guests. I know gym equipment can present liability issues, so I don’t advertise it on my listing or say anything about it to guests. I just assumed that guests wouldn’t want to work out in a shared space, but yesterday I popped in to grab a tool from the garage and my guest was on the treadmill. I personally don’t mind them using it, but how much of a liability risk is it? Should I add a house rule telling guests not to use it, or is it not worth worrying about? Unfortunately, I don’t have anywhere else I can move the treadmill, so that’s not an option right now.