Cognitive training sessions will be 30 minutes and physical exercise sessions will be 60 minutes, three times a week for 6 months. This combined intervention method has not been widely studied so results should be of particular interest. Another indication of post-traumatic stress disorder (PTSD) amongst elderly veterans is also currently in the clinical development pipeline (NCT04199182). The VA Office of Research and Development is recruiting to investigate this quickly emerging field of study. A three times a week supervised exercise program will continue for 6 months to see its effects on PTSD symptoms and related conditions such as sleep disorders amongst 188 older veterans. 693