No significant increase in overall symptoms was present after the test in symptomatic subjects versus the control subjects. Neither a short term (within 24 hours) nor a long term (within 14 days) increase was present in overall reporting of symptoms after administering the BCTT within a week of the acute injury.
Furthermore, it was found that the lower the maximal heart rate reached at the end of the BCTT, the greater the level of exercise intolerance and length of time needed for recovery from the concussion injury. It was also found that those who had a maximum heartrate of 135 beats per minute or less at the end of the BCTT are 45 times more likely to have a prolonged recovery period.
This article is useful in identifying a sub-maximal exercise training level to support concussion recovery. Additionally, given that no long-term delays in overall symptom resolution were demonstrated, the authors state that the BCTT can be used early in adolescent populations to support a clinical recovery plan, and predict who will potentially have a prolonged recovery.