5,000 vs 14,000 Steps a Day: What a Fitbit Study Shows About Attention and Self-Control

A walk along an autumn road

People who habitually take more steps each day score slightly higher on tests of attention and self-control, according to a study of more than 3,000 American adults whose activity was tracked by Fitbit devices. The most active group, averaging about 14,000 steps a day, outperformed the least active group, averaging about 5,000, on three of four cognitive tests. But the differences were small, the study was observational, and its authors stress that it does not show walking causes better thinking or establish a step target for brain health.

Fourteen years of fitness-tracker data

The study, conducted by researchers at Baylor College of Medicine in the United States, was published in Scientific Reports. The team used data from 3,093 adults enrolled in All of Us, a large research program run by the US National Institutes of Health. Participants ranged in age from 18 to 93, with an average age of about 58.

What sets this work apart from many earlier studies is how physical activity was measured. Previous research often relied on people reporting how much they moved, which can be inaccurate. Here, step counts came from Fitbit records covering 2009 to 2023. Not every participant had complete data for the whole period, so the researchers estimated each person’s typical activity level from the records that were available.

Alongside steps, the researchers looked at blood pressure. Beginning in September 2023, participants also completed a single set of cognitive tests.

Four tests, from focus to patience

The tests assessed four abilities:

• sustaining attention on a single task over time;
• avoiding distraction by irrelevant information;
• choosing between a small reward now and a larger reward later;
• recognizing emotions from facial expressions.

The third test may sound odd, but it measures self-control. People who are more willing to wait for a bigger payoff tend to be less driven by momentary impulses.

Three groups: roughly 5,000, 9,000 and 14,000 steps

Based on their tracker records, participants fell naturally into three groups. The most active outperformed the least active on three of the four tests: attention, resisting distraction and reward choice.

These figures were adjusted for age, education, income, marital status and place of birth. In other words, the researchers tried to separate the effect of movement from other factors — for example, the possibility that wealthier people both walk more and do better on tests. The authors themselves emphasize that the differences between the groups are small.

The groups did not differ in their ability to recognize facial emotions. Another notable detail: whether a person’s activity level changed over the years was not meaningfully linked to their test results.

Psychiatrist Okusaga, one of the study’s authors, explains where these skills matter in everyday life: for example, concentrating at work, avoiding impulsive decisions and sticking to long-term goals such as saving money or following a health plan.

Blood pressure explains only a small part of the link

The blood pressure findings were more modest. Higher systolic pressure (the first number in a blood pressure reading) was associated with slightly worse performance on only one test, the reward-choice task. After all adjustments, diastolic pressure was not meaningfully associated with any test.

The researchers also checked whether steps might affect thinking by way of blood pressure. Statistically, lower systolic pressure accounted for only about 5 percent of the association between steps and reward-choice scores. Even that does not mean that lowering blood pressure by itself would improve brain function.

Why might movement help the brain at all? The authors suggest possible explanations such as better sugar metabolism, less inflammation in the body and the brain’s capacity to reorganize itself. However, these mechanisms were not tested in this study and remain hypotheses.

The study does not set a step target for attention

It is tempting to conclude, “walk 14,000 steps a day and you will concentrate better.” The authors say plainly that this conclusion is not justified. According to Okusaga, the study was observational and was not designed to identify an optimal number of steps for brain health.

The figures of roughly 5,000, 9,000 and 14,000 steps are simply the average values of groups that emerged from the data, not recommendations. How many steps a day are needed for overall health is a separate scientific debate, and this study does not settle it.

In short, the authors’ own conclusion is that being active over many years is associated with better test results later on, but it has not been shown that activity is what improves them.

A man in a dark jacket running through an autumn park

Limitations: a single test and a narrow sample

The authors acknowledge several weaknesses in the work:

• cognition was tested only once, so it is impossible to say whether participants’ thinking improved or declined over time;
• the relationship may run in the opposite direction: people with sharper minds may simply be more inclined to stay active;
• real-world behavior, such as focus at work or financial decisions, was not studied directly;
• the analysis could not account for smoking or excess weight;
• most participants were white, about two-thirds were women, and nearly all had at least some college education.

The last point means the findings should be applied to other populations only with caution. The next step is already planned: the All of Us program intends to repeat the cognitive testing, which should make it possible to see how activity relates to changes in attention over the years rather than to a single measurement.