As long as I'm able to lift weights I lift weights. I've never cut significantly though, I'm happy with 15% body fat as a lower bounds - I look good, feel good and am strong at that weight.

Maybe I'll try to drop to 12% to see if I can do it sometime, but I'm a long way from that right now (our third kid is 5 months old so I'm back to being a fat-ass).

I continued to do physical activity. I think your muscles will "shrivel" if you don't use them; they won't be engorged with blood on a regular basis, thus will lose plasticity at a cellular level. Then when you do use them, they'll fill with less blood, and look smaller. It takes a lot to actually lose muscular tissue. Mostly people just lose muscular plasticity, and they appear smaller.