Exercise is better than any drug or anything else we have for aging. There's no downside. If this were a drug, it would be the safest, most effective drug in the universe. - Dr. James O. Hill, Director of the Center for Human Nutrition at the University of Colorado at Denver
Dr. Christina Economos discusses Living in the Balance: Nutrition and Physical Activity for a Lifetime. As I've mentioned in the past, this video was instrumental in getting me to start weight-training.
Note: For all the benefits, I recommend clicking on "Watch Full Program".