My schedule is so all over the map it's not funny. My job is pretty stressful and time consuming. I find if I get my exercise routine stopped I don't get back to it. Sometimes I have stressful situations for months at a time at work. Other times I am not very busy at all. I don't have a regular schedule where 30 minutes of free time is available to me consistently to do some fun kind of exercises - you know the enjoyable things like you mentioned and of course, horseback riding which is really more like a 4 hour minimum thing.
Wow! Heavan that sounds rough. I used to work in a group called "trouble management", so I get it. Those auditors would puzzle over a potential problem all day then open a ticket at 5:00 pm so they could go home, meaning I had to stay and fix it, with big money on the line, the clock was ticking. I liked the adrenaline rush, but it took a toll.
You might want to consider if carving out some time for exercise, even if it's five or ten minutes here or there, might make you able to work more effectively and be well worth the time investment. Sometimes when people are stressed they work more as a coping mechanism, as it gets your mind off other things. It then becomes a vicious cycle as you get stressed from working too much. Sometimes you have to step away from the situation for a bit to see potential solutions, maybe you could delegate or do something else to lighten the load. Everyone has their limits and while it's good to to feel needed, sometimes you have to say no. I don't know your particular situation, but just something to think about from a former workaholic.