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... new research by professor boyd swinburn and gary sacks, with the world health organisation collaborating centre for obesity at deakin university, melbourne, has found that global obesity rates began to rise in the 1970s, and that by 2008 an estimated 1

... obesity rates worldwide have doubled in the last three decades even as blood pressure and cholesterol levels have dropped, according to three new studies ... by 2008, the rates were nearly 10 percent for men and 14 percent for women ... 5 billion adults were overweight, according to the obesity study ... the research confirms earlier trends about mounting obesity and the three papers provide the most comprehensive, recent global look at body mass index, cholesterol and blood pressure ... experts warned the increasing numbers of obese people could lead to a "global tsunami of cardiovascular disease ... " obesity is also linked to higher rates of cancer, diabetes and is estimated to cause about 3 million deaths worldwide every year ... in an accompanying commentary, sonia anand and salim yusuf of mcmaster university in hamilton, ontario, said the global forecast for heart disease was "dismal and comprises a population emergency that will cost tens of millions of preventable deaths" unless countries take quick action ... rates were the lowest in japan, ranging between 22 for women and 24 for men ... two other studies also published in the lancet on friday surveyed blood pressure rates and cholesterol levels ... had some of the lowest blood pressure rates thanks to medication, while rates are highest in portugal, finland and norway ... he added that it was uncertain if the world's obesity rates had peaked and predicted other health complications would soon follow ... "we don't know how much worse the obesity problem will get," he said