"I think runners tend to be more solitary than bikers."

He was thin, as runners tended to be, and had endurance.

The runners who developed the problem tended to be slower, taking more than four hours to finish the course.

According to a 2010 study published in the journal Nature, runners who wear shoes tend to strike the ground with the heels of their feet first.

Vulnerable runners tend to develop pain when their training reaches 30 to 35 miles a week.

Overall, the runners tend to be livelier and more varied than the plates.

Recreational runners over 40 tend to have a short stride, which can compound the tightness.

Or it could be because slower runners tend to run with a larger pack.

So these runners tend to work hard and train differently.

The midlife runner tends to take stock and search for new thrills.