Don’t worry about speed at first or even distance. In fact, go slow. That means 50 to 70 percent of your maximum effort. The best way to find that zone is to run with a friend and talk while you’re doing so. If you can’t talk, you’re running too fast and too hard. Do a combo of running and walking if needed. Don’t be afraid to walk the uphills. Over time, add distance. Your long, slow runs will strengthen your heart and lungs, improve your circulation, and increase the metabolic efficiency of your muscles.
