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  • Title: The incremental shuttle walk test in older Brazilian adults.
    Author: Jürgensen SP, Antunes LC, Tanni SE, Banov MC, Lucheta PA, Bucceroni AF, Godoy I, Dourado VZ.
    Journal: Respiration; 2011; 81(3):223-8. PubMed ID: 20639622.
    Abstract:
    BACKGROUND: Despite widespread use of the incremental shuttle walk distance (ISWD), there are no reference equations for predicting it. OBJECTIVES: We aimed to evaluate ISWD in healthy subjects and to establish a reference equation for its prediction. METHODS: 131 Brazilian individuals (61 males; 59 ± 10 years) performed 2 walk tests in a 10-m long corridor. We assessed height, weight, body mass index, forced expiratory volume in 1 s, forced vital capacity and self-reported physical activity. RESULTS: Mean ISWD was greater in males than in females (606 ± 167 vs. 443 ± 117 m; p < 0.001). ISWD correlated significantly (p < 0.05) with age (r = -0.51), height (r = 0.54) and weight (r = 0.20). A predictive model including age, height, weight and gender explained 50.3% of the ISWD variance. In an additional group of 20 subjects prospectively studied, the difference between measured and predicted ISWD was not statistically significant (534 ± 84 vs. 552 ± 87 m, respectively), representing 97 ± 12% of the predicted value calculated with our reference equation for ISWD. CONCLUSIONS: This reference equation including demographic and anthropomorphic attributes could be useful for interpreting the walking performance of patients with chronic diseases that affect exercise capacity.
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