Almost any amount and type of physical activity may slow aging deep within our cells, a new study finds. And middle age may be a critical time to get the process rolling, at least by one common measure of cell aging.

Source: Does Exercise Slow the Aging Process? – The New York Times

The message here is don’t spend time commuting and sitting all day. Work — and exercise — at or close to home. And if you must commute, walk or bicycle.