Being an overweight, lazy person is bad in lots of ways: Epidemiologists estimate that about 80 percent of the most common diseases are linked to being severely overweight and leading a sedentary lifestyle. Obese people are at an increased risk for cardiovascular diseases, vascular diseases, hypertension, diabetes and cancer. Al this lowers their life expectancy.
Weight loss and physical activity help to counteract this. Women who lose weight lower their breast cancer risk while regular physical activity lowers the risk of developing breast, colorectal and cervical cancers.