Objective. The aim of this study was to identify whether the addition of an individualised Active Rehabilitation Intervention to standard care influences recovery of young patients who are slow-to-recover following a mTBI.Methods. Fifteen participants aged15±2years received standard care and an individualised Active Rehabilitation Intervention which included (1) low- to high-intensity aerobic training; (2) sport-specific coordination exercises; and (3) therapeutic balance exercises. The following criteria were used to measure the resolution of signs and symptoms of mTBI: (1) absence of postconcussion symptoms for more than 7 consecutive days; (2) cognitive function corresponding to normative data; and (3) absence of deficits in coordination and balance.Results. The Active Rehabilitation Intervention lasted49±17days. The duration of the intervention was correlated with self-reported participation (x-=84.64±19.63%,r=-0.792,p<0.001). The average postconcussion symptom inventory (PCSI) score went from a total of36.85±23.21points to4.31±5.04points after the intervention (Z=-3.18,p=0.001).Conclusion. A progressive submaximal Active Rehabilitation Intervention may represent an important asset in the recovery of young patients who are slow-to-recover following a mTBI.