The Author

About JJ Archer

Running has been one of the great constants of JJ Archer’s life. Through different decades, jobs, challenges, and joys, lacing up and heading out the door has always been there for him. Now in his sixties, he still runs five days a week. He’s raced marathons around the world, collected a wall of medals, and logged more miles than he can count. But the truth is, his favorite runs are often the half marathons he does quietly, on his own.

What running taught him is simple: progress doesn’t come from magic formulas or complicated charts. It comes from rhythm, patience, and learning to listen to your body. Over the years, JJ devoured training books, searching for wisdom — but too often they buried good advice under jargon and theory. He wanted a way to make running easier to understand, not harder.

That search became a mission. He started sharing what he had learned with friends, family, and runners he met and coached along the way. He trained with them, encouraged them, and showed them the simple habits that work. The response was always the same: “You should write this down.”

RunShift™ is his answer to those voices. It’s a lifetime of running, distilled into a system of gears — straightforward, adaptable, and designed for runners of all ages and levels.

“My promise is that this book contains all you need to know, and nothing you don’t. It will help you run smarter, stay injury-free, and discover the joy of progress — whether your goal is a first 5K, a personal best, or simply to keep running for life.”

— JJ Archer

The Philosophy Behind RunShift™