We can plump up our wrinkles and dye our greys, but on the inside, our hearts have their own age. Are those arteries smooth and limber, or hardened with waxy plaque? Spending five minutes at MyHealthCheckup.com can shed light on whether you have a youthful ticker or a pension-aged heart. The free cardiovascular-age calculator is designed for Canadians age 30 and up, based on research from McGill University and the University of Alberta. You don't have to give your name or create an account. You simply punch in your age, sex, height, weight, waist measurement and exercise habits. The app asks about smoking habits and family history of heart disease and diabetes, but includes an "I don't know" button for factors such as blood pressure, cholesterol and blood sugar levels, in case you haven't had those tests. Read the full story by clicking here. Quitting smoking, increasing exercise and taking the right medications can help keep cardiovascular disease at bay.