It helps keep me from driving everyone else around me crazy. While I never was diagnosed as hyperactive or having ADD or ADHD, I am a very energetic, fidgety, high-strung person, and blasting off some energy on the way to work helps me sort myself out and be reasonable, and I'll often go on a lunchtime ride. Getting out to get some fresh air, get away from the office, get moving...it helps me get through the afternoon blahs, and again helps me sit still and not fidget like an itchy dog or chatter like a magpie at my co-workers. The ride home helps me put the work day behind me, to get into "off duty" mode, to slough off the annoyances of the day and be in a fit state to be around my husband and/or friends.