Exercise is an important tool in the prevention of Alzheimer's, as it improves blood flow, brings essential oxygen and nutrients to the brain to function well, reduces stress hormones, and increases chemicals that nourish brain cells. Not only can exercise ward off depression, but it can also prevent damage to brain tissue.
Credit: Thinkstock Once you’ve reached your 70s, will you look back and thank your middle-aged self for spending another hour each day on social media rather than jogging around your neighborhood? According to new research, the answer is no: you’re more likely to wish that you’d had more self-discipline. A…