Performance and Physiological Response to the Buffalo Concussion Treadmill Test Can Identify Autonomic Dysfunction in the General Adult Population With Mild Traumatic Brain Injury: A Prospective Observational Study

This study demonstrates that the inability to exercise to a threshold HR of 90% of an individual's age-predicted maximum HR is a better indicator of autonomic dysfunction. HRR may be prolonged in those with a mild TBI, but caution should be taken if attributing this to physiological dysfunction as the predominant factor appears to be physical activity levels.