There was a time many decades back when people were expected to rise early in the morning, do some work during the daylight hours, and retire to bed early in the night, so that they can get up early again the next morning. This lifestyle allowed people to enjoy a reasonably good state of health, since they were more aligned with the forces of nature. With increasing industrialization and globalization, the barriers to global businesses have been either removed or greatly reduced. With the advent of computers and the internet, the lifestyle of humans has perhaps changed for ever. The internet allows people to work in any time-zone. Demands of business and work are no more linked to sunrise, and the focus has now shifted to working 24×7. People work for longer hours each day, or work in shifts at all times of day or night.

More stringent work requirements have also created an increased dependence on all imaginable items of comfort in all environments of office, home, or while in transit. These comforts have created a sedentary lifestyle where people are not expected to physically exert themselves while they focus on meeting their work targets.
All this has adversely affected the biological cycles of most people. A new breed of lifestyle diseases have emerged, like diabetes, high blood pressure, heart diseases, obesity, and many others. Even people of younger ages are being increasingly afflicted with such diseases. Very few people exercise regularly or have proper meals. In addition, easy availability of liquor in many regions, even to younger people, has further aggravated the problem.