I used to 'over exercise' when I was stressed, because the situation I was in didn't allow me for any other release of tension. Now I know better and have found 'conversations' with God have the same effect, with the bonus that I can still do other things. Maybe you're post here was guided by God. Perhaps he was saying, 'Enough over-walking!' Maybe you could use that pent up energy volunteering someplace, or helping someone with a chore they can't easily do themselves. It worked for me!
And, congratulations on finding a way to avoid constant addictive gaming ~ that's a tough one to overcome!