Many of us lead a sedentary lifestyle, not by choice but by default. We are part of the rat race, treading the mill of long hours on the job plus the slow crawl of vehicular traffic along the roads.

To avoid the jams, we leave home at the crack of dawn only to find that countless others have the same thought. At the office we sit slouched in our chairs staring at the computer screen, attending meetings that seem to go on and on, grab a fast food lunch and back to the grind.

At the end of...