Commotio Cerebri

Background: Concussion affects around 25 000 people each year in Denmark. A large research initiative (GAIN 2.0) has been established, and the current study is a part of this initiative. Aims: 1. To develop and test the efficacy of a novel intervention for people with persistent post-concussional mild-to-moderate symptoms: "Get going After concussion Lite" (GAIN Lite). 2. To increase the knowledge about the target group by investigating the association of physical activity, digital behaviour, and symptom load. Methods: A randomized controlled trial, comparing GAIN Lite to enhanced usual care. 100 adults diagnosed with a concussion at hospitals in Central Denmark Region or referred from general practitioners will be recruited. GAIN Lite is a digital intervention, and the primary outcome is the severity of post-concussional symptoms. A prospective cohort study will be performed to investigate the association between physical activity, cognitive processing, and symptom load.