Long-Term Study Suggests Physical Activity May Reduce the Impact of Genetic Risk on Depression Severity

October 10, 2026 major depressive disorder, polygenic risk scores, wearable technology

Major depressive disorder affects millions of individuals worldwide, presenting persistent challenges such as ongoing low moods, diminished interest in daily activities, and changes in sleep patterns or appetite. While medical professionals have long recognized that inherited genetic characteristics, adverse childhood experiences, and lifestyle choices influence the development of the condition, recent scientific investigations are shedding light on how these factors interact. A team of researchers at the University of Texas at San Antonio recently explored how everyday physical activity might alter the connection between a person’s genetic susceptibility to depression and the actual severity of their symptoms.

Published in the journal Nature Mental Health, the study utilized extensive data from the National Institutes of Health’s All of Us Research Program. The collaborative initiative gathers comprehensive health, lifestyle, and genetic records from a diverse population across the United States. To gain an accurate picture of everyday habits rather than relying on short-term questionnaires, lead author Qiliang He and his colleagues analyzed fitness tracker data, electronic health records, and genetic markers from over 23,000 adult participants. On average, participants contributed roughly 1.6 years of continuous wearable data, providing a robust measure of habitual movement, including daily step counts and minutes spent engaged in moderate-to-vigorous physical activity.

The investigators calculated a depression polygenic risk score for each participant to estimate their inherited vulnerability to the condition. By comparing these genetic profiles with electronic health records and self-reported diagnoses, the team sought to advance precision medicine by understanding how modifiable behaviors might intersect with genetics. While higher genetic risk scores were associated with a greater likelihood of receiving a depression diagnosis—and greater physical activity was linked to a lower overall likelihood of a diagnosis—the most striking discovery involved symptom severity among those who experienced the condition.

Participants who maintained higher levels of physical activity generally experienced less severe depression symptoms than those who were less active.
Individuals with a higher genetic predisposition to depression appeared to derive even greater relative benefits from regular physical activity.
The positive association between activity and reduced symptom severity remained consistent across multiple tracking metrics, including daily steps and moderate-to-vigorous exercise.

The study authors emphasize that because the research was observational, it cannot definitively prove that increasing exercise directly counteracts or offsets genetic risks. Nevertheless, the findings offer valuable insight into the complex relationship between daily routines and mental health. Senior researchers note that understanding how everyday behaviors interact with biological predispositions could eventually pave the way for more personalized lifestyle interventions and prevention strategies tailored to an individual’s unique genetic profile.

Looking ahead, the research team aims to expand their investigations to determine whether similar lifestyle interactions apply to other prevalent mental health conditions, such as anxiety disorders, which share substantial genetic overlaps with depression. Future initiatives may also evaluate additional modifiable lifestyle factors, including sleep quality, to better comprehend how everyday habits shape mental well-being over the long term.

Source: Medical Xpress