Objective
To examine cardiorespiratory fitness in individuals with traumatic brain injury (TBI), prior to and following participation in a supervised 12-week aerobic exercise training program.
Methods
Ten subjects with non-penetrating TBI (TBI severity: Mild, 50%; Moderate, 40%; Severe, 10%; Time since injury: 6.6 ± 6.8 years, mean ± SD) performed exercise training on a treadmill 3 times a week for 30 minutes at vigorous intensity (70 – 80 % of heart rate reserve). All subjects completed a cardiopulmonary exercise test with gas exchange measured and a questionnaire related to fatigue (Fatigue Severity Scale; FSS) at baseline and following exercise training.
Results
After training, increases (p<0.01) in peak oxygen consumption (VO2; +3.1 ± 2.4 ml/min/kg), time to volitional fatigue (+1.4 ± 0.8 min), and peak work rate (WR; +59 ± 43 watts) were observed. At the anaerobic threshold, VO2 (+3.6 ± 2.1 ml/kg/min), treadmill time (+1.8 ± 1.1 min) and WR (+37 ± 39 watts) were higher (p<0.01) following exercise training. Subjects also reported significantly lower (p<0.05) FSS composite scores (−0.9 ± 1.3) following exercise training.
Conclusion
These findings suggest that individuals with TBI may benefit from participation in vigorous aerobic exercise training with improved cardiorespiratory fitness and diminished fatigue.