Associations among aerobic physical activity, mild traumatic brain injury history, and health-related quality of life in military service members and Veterans: A LIMBIC-CENC study.

The study is cross-sectional, meaning it captures a single point in time and cannot determine if exercise improves quality of life or if people with better quality of life are more likely to exercise. Exercise participation was based on self-reported primary activity only, ignoring secondary activities and resistance training, which may underrepresent total physical activity. The sample was limited to formerly deployed service members with combat exposure who consented to a brain health study, which may not represent the broader military or civilian populations. Participants with missing data were removed from the analysis, and the authors did not determine if this removal introduced bias. The study did not correct for multiple comparisons, increasing the risk that some significant findings may be false positives.

The study was funded by the US Department of Defense and the US Department of Veterans Affairs. The authors declared no competing financial interests.

Do not interpret this as evidence that prescribing an aerobic exercise program will improve quality of life in patients with mTBI. This is an observational study showing an association at a single point in time, not a randomized trial testing an intervention, so causality cannot be inferred.