It is suggested that runners and walkers take a rest week once a month of about 66-75% of their normal. This is my rest week, and my wife and I went to the South Jordan City rec center.
There are four classifications of air-quality in the Salt Lake Valley, and I go outside for two of the classifications and to the rec center for the other two classifications. Green and Yellow days are for outside running and walking, and Orange and Red days are for inside lap running and walking. The size of the smog particles decides which classification will be in effect for a given day. Today was an Orange day, and I decided to have the week be a rest week because the air is bad outside.