In developing countries , experts deem that high-calorie food selections and bigger portions have become the basis of the normal diet , leading to extreme calorie intake and escalating the occurrence of obesity (Drewnowski 1997 , pp .31-43 . Furthermore , both adults and children spend less time dedicated to exercise due to longer work hours at deskbound jobs , a weakening in physical education programs in schools , and increased involvement in inactive recreational activities like browsing the Internet , playing video games , and watching television . Moreover...











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