Key result
The Incremental Shuttle Walk Test distance significantly correlated with exercise test METs (rs = 0.61, P < .001) and accurately predicted functional capacity ≥7 METs (AUC = 0.774).
Why the study?
The study was conducted to evaluate the validity of the Incremental Shuttle Walk Test (ISWT) for determining risk stratification in cardiac rehabilitation.
Does the Incremental Shuttle Walk Test accurately assess functional capacity compared to a standard exercise test in clinically stable adult cardiac patients?
Cross-Sectional (n=115)
No
Does the Incremental Shuttle Walk Test accurately assess functional capacity compared to a standard exercise test in clinically stable adult cardiac patients?
Effect estimate: rs = 0.61
p-value: p=< .001
The Incremental Shuttle Walk Test is a valid, low-resource alternative to standard exercise testing for evaluating functional capacity and risk stratification in cardiac rehabilitation patients.
ISWT may support functional capacity estimation in cardiac rehab; extends correlations but leaves open prospective validation.
PURPOSE: To evaluate the validity of the Incremental Shuttle Walk Test (ISWT) for determining risk stratification in cardiac rehabilitation (CR). METHODS: This is a cross-sectional study at a major CR center in a middle-income country. Clinically stable adult cardiac patients underwent an ISWT and an exercise test (ET), wore a pedometer for 7 d, and completed the Godin-Shepherd Leisure-Time Physical Activity Questionnaire. Metabolic equivalents of task (METs) achieved on the ISWT were calculated. RESULTS: One hundred fifteen patients were evaluated. The mean ± standard deviation distance on the ISWT was 372.70 ± 128.52 m and METs were 5.03 ± 0.62. The correlation of ISWT distance with ET METs (7.57 ± 2.57), steps/d (4556.71 ± 3280.88), and self-reported exercise (13.08 ± 15.19) was rs = 0.61 (P < .001), rs = 0.37 (P < .001), and rs = 0.20 (P = .031), respectively. Distance on the ISWT accurately predicted METs from the ET (area under the receiver operating characteristic curve = 0.774). The ability to walk ≥410 m on the ISWT predicted, with a specificity of 81.5% and a sensitivity of 65.6%, a functional capacity of ≥7 METs on ET. CONCLUSION: The ISWT is an alternative way to evaluate functional capacity in CR and can contribute to the process of identifying patients at low risk for a cardiac event during exercise at moderate intensity.
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Lelis et al. (2019) conducted a cross-sectional in Cardiac rehabilitation (n=115). Incremental Shuttle Walk Test (ISWT) vs. Exercise test (ET) was evaluated on Correlation of ISWT distance with ET METs (rs = 0.61, p=< .001). The Incremental Shuttle Walk Test distance significantly correlated with exercise test METs (rs = 0.61, P < .001) and accurately predicted functional capacity ≥7 METs (AUC = 0.774).
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