"run through" the thing

The object, according to Denton, was to "run through" the thing, just as he maintained one should attempt to "run through" most of those other little hubcaps life rolls into your lane; everything from death in the family to cancer of the colon.

Breaking down was not a required checkpoint on the road to competitive fitness. In fact, many coaches warned against it. But Denton viewed it as an opportunity to leapfrog over months of safer, less strenuous training, thus tempering survival-hardened muscles. The alternative, total rest, was too much the other extreme, the easy way out. That wouldn't do.

The toll on the runner—and those around him—was high, psychologically as well as physically. He became weak, depressed; he needed twelve to fourteen hours of sleep a night. He was literally desperate for rest, spent his waking hours with his legs elevated, in a state of general irritability. He became asexual, rendered, in the world of the immortal limerick, really quite useless on dates. He was a thoroughly unpleasant person.

-- Once a Runner by John L. Parker, Jr.