The unhealthy diet, sedentary lifestyle and heavy smoking embraced by many Greeks has resulted in the country rising from a low-risk area for heart disease to a medium-risk one, leading cardiologists told a press conference yesterday. Youngsters are particularly at risk as many habitually consume junk food in front of the television, doctors said ahead of World Heart Day on Sunday. According to experts, the average 18-year-old has been bombarded with up to one million advertisements for convenience food. Switching to a diet rich in fruit and vegetables and eating meals with the TV turned off will help reduce risks of heart disease, doctors said. Kiosks with information about heart problems will be set up in Athens, Thessaloniki and Patras on Sunday.