Ten Minutes of Very Slow Running Linked to Better Mood and Executive Function

Ten minutes of very slow running was followed by improvements in mood and executive function in a study that used treadmill exercise and functional near-infrared spectroscopy (fNIRS) to examine brain activity.

The research, published in Imaging Neuroscience, focused on running at approximately 3–6 kilometers per hour, or about 2–4 miles per hour. That pace is close to walking and represented roughly 35% of peak oxygen uptake, making it a very light-intensity activity.

After completing the 10-minute session, participants recorded a more pleasant mood and had a shorter Stroop interference time. The Stroop task is used to assess executive function, including the ability to manage competing information and responses.

Brain measurements taken with fNIRS showed increased activity in prefrontal regions associated with executive function and mood regulation. The strongest changes were reported in the left dorsolateral prefrontal cortex and left frontopolar cortex.

The researchers also examined the movement produced by running itself. Greater vertical movement of the head—the gentle up-and-down oscillation characteristic of running—was associated with larger improvements in mood. This was an association within the study, rather than evidence that head movement independently caused the mood change.

The findings address a gap in exercise research, much of which has used cycling because laboratory researchers can precisely control its intensity. Running is more closely tied to a fundamental human movement and is widely practiced, but the source report notes that less was known about whether very low-intensity running could produce similar cognitive and emotional effects.

The results do not establish that a brief run improves long-term mental health, fitness, or cognitive performance, nor do they show that running is superior to other forms of light exercise. The study measured responses after a single 10-minute session, and the supplied report does not provide participant numbers or further details about the study population.

The University of Tsukuba researchers said the low physical demand of very slow running could make it accessible to people with lower fitness levels or those who find more strenuous exercise difficult. That interpretation remains a potential application of the findings rather than a demonstrated clinical benefit.

The study also points to earlier research cited in the report, which found that 10 minutes of very light-intensity exercise could enhance hippocampal-dependent memory. Together, these findings suggest that cognitive responses to exercise may occur even at relatively modest intensity, although the slow-running study specifically reported short-term changes in mood, executive-function performance, and prefrontal activity.