New Study Reveals Optimal Daily Step Count for Cognitive Health

The widely circulated goal of 10,000 daily steps, often promoted for general health, may not be the key to sharpening cognitive function, according to new research. A study involving over 3,000 participants suggests that a different, and potentially lower, number of steps is associated with better cognitive performance, including sustained attention and delayed gratification.

Researchers from Baylor College of Medicine in Houston utilized objective data from Fitbits worn by participants aged 18 to 93, spanning from 2009 to 2023. This approach moved beyond self-reported step counts, offering a more accurate measure of physical activity.

The study categorized participants into three groups based on their average daily steps: the least active averaged 5,108 steps, the moderately active averaged 8,875 steps, and the most active averaged 14,161 steps. Participants then underwent cognitive tests designed to assess attention span, the ability to delay gratification, recognition of emotional cues, and the capacity to ignore distractions.

Significant findings indicated that the moderately and most active groups outperformed the least active group across tests measuring sustained attention, ignoring distractions, and delayed gratification. The most active group excelled in sustained attention and delayed gratification, while the moderately active group showed a slight edge in ignoring distractions.

The research builds upon existing recommendations that any physical activity is beneficial, and more activity generally leads to better outcomes. Each additional 1,000 steps taken daily at a moderate pace, estimated to take about nine minutes, was linked to improvements in sustained attention, the ability to ignore distractions, and delayed gratification.

While the study provides valuable insights into the relationship between physical activity and cognition, the researchers noted limitations. The participant pool was predominantly composed of individuals with some college education and health insurance, with a majority being white and female. This demographic makeup raises questions about the generalizability of the findings to broader populations. Furthermore, the study measured cognitive performance at a single point in time, making it impossible to definitively conclude that increased step counts cause better cognition rather than simply being associated with it. Researchers acknowledged that other factors, such as blood pressure, may play a role, explaining a small portion of the observed relationship between physical activity and decision-making scores. The study also did not find significant links between step count and the ability to recognize emotional cues, suggesting that this particular cognitive function might be influenced by different neurological pathways or require more sensitive testing methods.