ALSO BY MATT FITZGERALD

FOREWORD

APPENDIX: Detailed Intensity Control Guidelines for 80/20 Workouts

INDEX

FOREWORD

Fifteen years ago, when I was training at a high level with my twin brother, Weldon, a twenty-eight-minute 10K runner, and dreaming of the U.S. Olympic Trials, I had a conversation with my beloved ninety-year-old grandmother, “BB,” that I’ll never forget.

“Boys, I don’t understand this running thing,” she said. “I can imagine nothing worse than waking up and realizing I was going to have to run fifteen miles that day.”

“BB, it’s not like you think,” I replied. “Running is the best part of my day. Most of the time I’m not running hard. Weldon and I just run side by side at a relaxed pace and carry on a conversation for an hour and a half. It’s a ninety-minute social hour.”

“Oh, that doesn’t sound too bad,” BB said. “I always viewed running as a form of grueling punishment.”

My grandmother’s misconception was far from uncommon. A lot of people viewed running as she did—and still do. But Matt Fitzgerald is about to let you in on a secret: Running isn’t always supposed to be hard. In fact, most of the time, it should be easy and enjoyable.

You see, in order to yield steady improvement, a training system must be repeatable—day after day, week after week, month after month. And guess what. Hard running isn’t repeatable, either physically or psychologically. If you do too much of it, your body will burn out if your mind doesn’t first.

The ultimate compliment for me in my peak training years was being passed on my easy runs by a runner who had a marathon time more than an hour slower than mine. I’d say to myself, “He’s wearing himself out today. I’m building myself up.”

All too many runners wear themselves out by running too fast too often—now more than ever. There is an obsession these days with high intensity. Most of the trendy new training systems are focused on speed work. Running magazines, Web sites, and books can’t say enough about the magical power of intervals. Even champion runners are more likely to credit their speed work instead of their easy running when interviewed after winning a race. Yet the typical elite runner does eight miles of easy running for every two miles of faster running.

Speed work may be “sexier” than easy running, but just as a weight lifter doesn’t go hard two days in a row, a runner shouldn’t either. A weight lifter actually gets stronger on days off. Similarly, a runner gets faster by going slow in the majority of his or her runs. Strangely, most weight lifters seem to understand this principle, while most...