If anything I think most people (at least where I live in Colorado) are getting significantly more exercise. Everyone is outside biking, hiking, running, paddling, fishing, etc. They may not be doing a Pilates class or on a treadmill, but are exercising none the less. And with no endless stream of school events and kids sports, I can go hiking every day after work if I want. I've never spent this much time outside since I was probably 12 years old.