If you are a young college student, most of your concerns about your health and happiness in life are probably (36) ______ on the present. (37) ______ , you want to feel good physically, mentally, and (38) ______ now. You probably don't spend much time worrying about the (39) ______ future, such as whether you will develop heart disease, or (40) ______ , how you will take care of yourself in your (41) ______ years, or how long you are going to live. Such thoughts may have (42) ______ your mind once in a while, however, if you are in your thirties, forties, fifties, or older, such health related thoughts are likely to become (43) ______ important to you. (44) ________________________________________________________ that will help you feel better physically and mentally. Recently researchers have found that, even in late adulthood, exercise, strength training with weights, and better food can help elderly individuals significantly improve their health and add happiness to their life. (45) ______________________________________________________ giving us the opportunity to avoid some of the health problems that have troubled them. (46) __________________________________________________________ .