According to professor Jane Wardle, the rapid rise in obesity rates could be related to the widespread ownership of microwave ovens.
Obesity rates started to rise soon after 1984, at about the same time as the microwave became a common household item.
This argument was proposed as one of three theories outlined during a debate on the subject at UK's Cheltenham Science Festival. Professor Tim Lang argued that the introduction of the supermarket was the cause.
Meanwhile, professor Ken Fox posited that the obesity epidemic can actually be traced back to 1945, when technology began to replace physical effort in work and leisure.
In 1980, 8 percent of women and 6 percent of men were classified as obese; by 2004, this had increased to 24 percent of men and women. Dr. David Haslam, clinical director of the National Obesity Forum, said that all three theories could be contributing factors, and that there was no single cause.
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