In a company I work for, some people take time to exercise at lunchtime - 11yoga seem to fit right there. Basically, lunch then takes longer then if you eat during that time, but not by horribly lot.

I does not seem to me so horrible honestly, assuming that you then stay longer to make up for time spend by exercising. I dont do that, because I need to take kids out of school basically, but when I had time to exercise a bit in the middle of the day I was more productive.