Perhaps if you just reframed your thinking... nap time means me time that would help. Sometimes for me simply thinking about things in a different way helps. I'm glad you're going to be able to go to the gym soon. I hope that helps.

In the mean time, do you know any other moms you could swap child care with? Or have a friend who might be willing to watch your kids for an hour so you can have a break? My mom loves telling the story of when I was 2 and my mom's friend (also the mother of my best friend growing up) called and asked if my mom was going to come get the kid or if she was going to just kill him then (joking of course...but let my mom know how serious she was). See, it's been going on for forever...he did btw make it to adulthood and is now an astrophysicist.