A brief summary of current research.
Impact of physical activity on mood after TBI
Driver, S & Ede, A Brain Injury, Volume 23, Issue 3 March 2009, pages 203–212
This study found that routine physical activity (in this case, swimming) had positive effects on mood for persons with brain injury. This is important because of the known higher rates of psychosocial issues such as depression and tension in persons with brain injury.