Abstract
Background For children with cerebral palsy (CP) who are able to walk or run, the 10-m shuttle run test is currently the test of choice to assess cardiorespiratory fitness. This test, however, has not yet been examined in wheelchair-using youth with CP.
Objective The purpose of this study was to investigate the test-retest reproducibility and validity of the 10-m shuttle ride test (SRiT) in youth with CP.
Design Repeated measurements of the SRiT were obtained.
Methods Twenty-three individuals with spastic CP (18 boys, 5 girls; mean age=13.3 years, SD=3.6 years) using a manual wheelchair for at least part of the day participated in this study. During the study, all participants performed one graded arm exercise test (GAET) and 2 identical SRiTs within 2 weeks. Peak oxygen uptake (V̇o2peak), peak heart rate (HRpeak), and respiratory exchange ratio (RER) were recorded. Intraclass correlation coefficients (2,1), the smallest detectable difference, and the limits of agreement (LOA) were calculated. The association between the results of the SRiT and GAET was tested using Pearson correlation coefficients.
Results Intraclass correlation coefficients (.99, 95% confidence interval=.98–1.00) for all variables indicated highly acceptable reproducibility. The LOA analysis revealed satisfactory levels of agreement. The SRiT variables demonstrated strong, significant positive correlations for V̇o2peak values obtained during the SRiT and the GAET (r=.84, P<.01).
Limitations Although the GAET is considered the gold standard, the cardiorespiratory demand during the GAET was significantly lower compared with during the SRiT. Future studies should determine whether the GAET can still be accepted as the gold standard for upper-extremity exercise.
Conclusions The SRiT is a reproducible and valid test for measuring cardiorespiratory fitness in youth with spastic CP who self-propel a manual wheelchair.
Footnotes
Dr Verschuren, Dr Ketelaar, and Dr Takken provided concept/idea/research design and fund procurement. All authors provided writing. Dr Verschuren, Ms Zwinkels, Ms Reijnders-van Son, and Dr Takken provided data collection. Dr Verschuren and Dr Takken provided data analysis and project management. Ms Reijnders-van Son and Dr Takken provided facilities/equipment. Dr Ketelaar provided consultation (including review of manuscript before submission). The authors are grateful to the children, their parents, and the physical therapists from Ariane de Ranitz, Rehabilitation Centre Blixembosch, Mytylschool Eindhoven, Tolbrug Specialistic Rehabilitation, Mytylschool Gabriël, and Emiliusschool who volunteered their time and assistance.
The Institutional Review Board of the University Medical Center Utrecht, approved the study.
The study was funded by the Dr W.M. Phelps Foundation.
- Received December 17, 2012.
- Accepted April 4, 2013.
- © 2013 American Physical Therapy Association
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