Estimated V[Combining Dot Above]O2max From the Rockport Walk Test on a Nonmotorized Curved Treadmill.

• Autores: Rhiannon M. Seneli, Kyle T. Ebersole, Kristian M. O'Connor, Ann C. Snyder
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 27, Nº. 12, 2013, págs. 3495-3505
• Idioma: inglés
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• Resumen

  • The Rockport Walk Test (RWT) is a 1-mile walk used to estimate the maximal volume of oxygen uptake (V[Combining Dot Above]O2max). The purpose of this study was to validate the RWT on a nonmotorized curved treadmill (CT). Twenty-three healthy adults (10 females; 19-44 years old) participated. One trial of the RWT was performed on a measured indoor track (RWTO) and another on the CT (RWTC) on different days in randomized order. Heart rate (HR) and completion time were used to calculate V[Combining Dot Above]O2max using 6 different general and gender specific equations from previous research. Subjects also performed a treadmill graded exercise test (GXT), which was used as the criterion measure for V[Combining Dot Above]O2max. Completion times and HR between the 2 RWT were compared using dependent t-tests. Estimated V[Combining Dot Above]O2max values were compared between the RWTC, RWTO, and GXT through repeated measures analysis of variance, Pearson's correlations (r), and Bland-Altman's plots. There was no difference between completion times for the RWTO and RWTC but HRs were significantly higher with RWTC. When the same equation was applied to the RWTO and RWTC, there were no similar results. All V[Combining Dot Above]O2max estimations were different from observed V[Combining Dot Above]O2max except for the estimation from the relative general Kline et al. equation on the RWTO. Despite high correlations (r = 0.75-0.91), the RWTC underestimated V[Combining Dot Above]O2max. The RWTC underestimates V[Combining Dot Above]O2max but may be beneficial if a new equation were created specifically for the CT. With appropriate equations for the CT, the RWTC would provide an alternate form of V[Combining Dot Above]O2max testing.