It’s been called “the most effective, potent way that we can improve quality of life and duration of life.” If it were a drug, “it would likely be the most valuable pharmaceutical ever developed.” It isn’t a new supplement or super food, and best of all it’s free. It’s . . . exercise! In a recent issue of Time magazine, reporter Mandy Outlander explored the cutting edge of exercise research with various experts who have become increasingly excited about “exercise as medicine.” His own research prompted the rave reviews above from genetic metabolic neurologist Dr. Mark Tarnopolsky at McMaster University in Ontario. That exercise is good for us isn’t exactly news, but Dr. Tarnopolsky hopes that by pointing out all its wonderful rewards, he may motivate us enough to jump up out of our chairs and actually do it! Rewards being documented are both immediate and long-term. Right after a short exercise session, measurable results include improved mood, less arthritic and lower back pa…