Study design: Prospective assessment as part of initial evaluations for randomized-controlled trial participation. Objectives: To determine the test-retest reliability of peak VO 2 testing during both robotically assisted body weight supported treadmill training (RABWSTT) and arm cycle ergometry and to assess whether a relationship exists between these two measurements in individuals with chronic motor incomplete spinal cord injury (CMISCI). Methods: Twenty-one participants with CMISCI enrolled in a 3-month, RABWSTT randomized-controlled trial. As part of their baseline assessments, individuals underwent VO 2 peak assessments twice on separate days during both RABWSTT and arm cycle ergometry using a metabolic cart. Results: Peak oxygen consumption measured at baseline correlated significantly between repeated tests in the RABWSTT (r ¼ 0.96, Po0.01) and the arm ergometer (r ¼ 0.95, Po0.01). A Pearson correlation (r ¼ 0.87, Po0.01) existed between the peak VO 2 measurements obtained using RABWSTT and arm ergometry, although Bland-Altman analysis suggested a more limited relationship with a bias of 1.1 favoring arm ergometry. This relationship was stronger for individuals with tetraplegia than for people with paraplegia. Conclusion/clinical relevance: Determination of VO 2 peak during both RABWSTT and arm ergometry in individuals with CMISCI is highly reproducible. Furthermore, a moderate correlation exists between peak VO 2 measured during RABWSTT and arm cycle ergometry in this population for individuals with tetraplegia. This correlation offers implications for future cardiovascular testing of individuals with CMISCI, as two reliable peak VO 2 measurement techniques are possible. Spinal Cord (2014) 52, 287-291; doi:10.1038/sc.2014.6; published online 18 February 2014Keywords: robotically assisted body weight supported treadmill training; chronic motor incomplete spinal cord injury; peak VO 2 ; reproducibility; validity INTRODUCTION Individuals with spinal cord injury (SCI) experience decreased lean muscle mass and increased total body and abdominal fat, predisposing them to a higher incidence of diabetes, hypertension and dyslipidemia than able-bodied people. 1-4 These problems, in part, are caused by neuromuscular limitations following injury and the subsequent associated sedentary lifestyle. Physical activity is recommended to combat these health-related problems. Unfortunately, the person with SCI holds limited activity options. Several evidence-based guidelines exist for the able-bodied population, including the Adult Treatment Panel III, which recommends aerobic exercise to achieve cholesterol modification and weight reduction. 5 However, specific available exercise guidelines are limited for individuals with SCI, and the associated restricted muscle activation, secondary metabolic derangements and barriers to accessing exercise opportunities may limit activity engagement. [6][7][8] This lack of optimal aerobic exercise recommendation for individuals with SCI partially stems from limited information
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