Working out while locked up

I’m curious if anyone else has navigated a similar scenario. I’m working on getting fit again, so I plan to resume lunchtime classes. Since the sessions are BJJ and Muay Thai, being locked up is definitely an obstacle. We encountered this problem during our last attempt at chastity but never quite resolved it.

My wife supports my fitness goals but obviously prefers that I stay without access to the key. It seems difficult to avoid entirely currently. When she thinks I’ll make class on time, she leaves me unlocked those days often enough. However, work complications sometimes prevent me from going out, which leads to frustration because I ought to be locked and also feel tempted. Fortunately, I haven’t yielded yet.

I didn’t know if anyone had solved this kind of issue or not, so I figured I’d ask around. If no clear solution exists, I think I’ll need to negotiate the point that being able to hold my own key while still wearing it is preferable for me compared to having it taken away. It’s not perfect, but I believe the sensation of the device will keep things under control and prevent excessive frustration.