Weight gain - a runaway train?

摘要

The other day, I hailed a taxi and asked the driver to help me put my bag in his boot. He apologised, and said he was unable to get out without help himself. 'It's all this; he said, indicating his substantial corporation. This man was not just overweight. He was what we doctors call morbidly obese. The problem, of course, was that my taxi driver took in more energy than he expended. He had gained weight gradually but inexorably, putting on about an ounce a day for the past 10 years.That added up to two pounds a month - almost two stone every year. But given that his energy intake-output imbalance was so small, and that he was (he claimed) motivated to lose weight, why could this apparently intelligent man not control himself?