I used to think walking during a race was a weakness. Then my first marathon humbled me.

Run faster than you ever thought possible, all thanks to the power of walking.

I don’t know when the idea came to me. Perhaps it was some time last year, when my dad scored Masters tickets for the first time and, as April approached, he’d be out of breath every time I called.

While the Bank of America Chicago Marathon attracts some of the world’s top runners and plenty of spectators, they aren’t the only ones looking forward to race day. A number of walkers are, too. If ...

Jeff Galloway, a member of the 1972 U.S. Olympic team who for decades inspired elite athletes and countless everyday runners ...