New Delhi, Aug. 23 -- How do you work? . you probably spend long hours in front of a computer. I do. It didn't occur to me that the chair I was sitting on was the source of my back problems. It took me several visits to an orthopedic surgeon and an acupuncturist to realize that I had to change my work patterns, hence my proclamation that the second villain of the modern age is the simple chair.

Anthropologists say the human body is made for standing and walking, not sitting. We sit far too much and far too long. So, how do we incorporate standing and walking into our lives? Some Silicon Valley executives work using an 'air desk', a stand that allows you to type on your laptop while walking or running on a treadmill. Many use standing des...