Does Mental Health History Shape Marathon Pacing? A New Study Looks

Marathon performance is never only physiological. Pacing decisions are also made under stress, discomfort, uncertainty, and accumulating fatigue. A new study asked whether a history of psychiatric diagnosis was associated with how runners managed that load.

Before the Boston Marathon, 450 runners completed surveys covering lifetime psychiatric diagnoses, demographics, training, injury status, marathon experience, previous best time, psychological traits, and current anxiety symptoms. The researchers then linked those responses to official finish and split times. About 16.7% of participants reported a lifetime psychiatric diagnosis.

• Runners reporting a diagnosis finished in an average time of 4:14:11, compared with 3:53:59 among runners without one.
• Their goal realization—how closely actual performance matched the anticipated finish time—was also slightly lower.
• The pacing trajectories gradually diverged, with the diagnosis group accumulating about 25 additional seconds per kilometer as the race progressed (i.e., they slowed down more as the race went on).

What this means for runners

A psychiatric diagnosis should not be thought of as a performance ceiling. Mental health belongs inside race preparation rather than outside it. If symptoms, sleep disruption, stress, or treatment changes affect training consistency or effort regulation, those factors deserve the same advance planning as fueling and pacing.