Here’s your free but abridged version of this week’s “Run Long, Run Healthy” newsletter. Subscribe here to receive the full edition with more on the latest scientific articles and research on training, nutrition, shoes, injury prevention, and motivation. Get more from the latest in running sports science: Run Long, Run Healthy Premium for as little as $3/month What If Muscle Glycogen Isn’t the Performance Limiter We Think It Is? Is endurance performance merely a game of maintaining blood...