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| Effects of respiratory muscle endurance training on wheelchair racing performance in athletes with paraplegia: a pilot study |
| Mueller G, Perret C, Hopman MT |
| Clinical Journal of Sport Medicine 2008 Jan;18(1):85-88 |
| clinical trial |
| 3/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
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OBJECTIVE: Respiratory muscle endurance training (RMET) has been shown to improve both respiratory muscle and cycling exercise endurance in able-bodied subjects. Since effects of RMET on upper extremity exercise performance have not yet been investigated, we evaluated the effects of RMET on 10-km time-trial performance in wheelchair racing athletes. DESIGN: Pilot study, controlled before and after trial. SETTING: Spinal cord injury research center. PARTICIPANTS: 12 competitive wheelchair racing athletes. INTERVENTIONS: The training group performed 30 sessions of RMET for 30 min each. The control group did no respiratory muscle training. MAIN OUTCOME MEASUREMENTS: Differences in 10-km time-trial performance pre- versus postintervention. RESULTS: In the training group, the time of the 10-km time-trial decreased significantly from before versus after intervention (27.1 +/- 9.0 versus 24.1 +/- 6.6 min); this did not occur in the control group (23.3 +/- 2.8 versus 23.2 +/- 2.4 min). No between groups difference was present (p = 0.150). Respiratory muscle endurance increased significantly within the training group (9.1 +/- 7.2 versus 39.9 +/- 17.8 min) and between groups, but not within the control group (4.3 +/- 2.9 versus 6.6 +/- 7.0 min) before versus after intervention. CONCLUSION: There was a strong trend, with a large observed effect size of d = 0.87, towards improved performance in the 10-km time-trial after 6 weeks of RMET.
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