Running a half or full marathon is on many runners’ bucket lists, but to be the best runner possible, it’s important to regularly challenge yourself with different distances and types of runs—and that ...

No matter how many times I’ve been told (or written about) the importance of a slow run, I cannot translate it into my training. This is not to say that I am the fastest runner. My goal half marathon ...

Marathoners generally don’t lose any sleep over how fast they can sprint, nor do they spend time developing their top-end speed. But Veronique Billat, a French exercise physiologist and author of The ...