Contrary to what you might think, the technique doesn’t mean walking when you’re tired; it means taking brief walk breaks when you’re not.
Depending on one’s fitness level, a walk-break runner might run for a minute and walk for a minute, whether on a 5-mile training run or the 26.2-mile course on race day. A more experienced runner might incorporate a one-minute walk break for every mile of running.
Taking these breaks makes marathon training less grueling and reduces the risk of injury, Mr. Galloway says, because it gives the muscles regular recovery time during a long run. Walk breaks are a way for older, less fit and overweight people to take part in a sport that would otherwise be off limits. But most surprising are the stories from veteran runners who say run-walk training has helped them post faster race times than ever.
--Tara Parker-Pope, NYT, on getting faster by periodically slowing down