Lifestyle-related factors, including maintaining body weight, abstaining from smoking and regular exercise, play a vital role in ensuring one lives to the age of 90, according to researchers led by Dr. Laurel Yates of the Brigham and Women’s hospital in Boston. The researchers followed 2,357 men from 72 years of age and conducted the survey over two decades. The study, published in the Archives of Internal Medicine, showed that the chances of reaching 90 years was 54% in the absence of smoking, diabetes, obesity, hypertension and a sedentary lifestyle.