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Validity of the two-minute step test for healthy older adults
Luis A Berlanga1, Michelle Matos-Duarte2, Pedro Abdalla3
1Department of Physical Activity and Sport, Centro de Estudios Universitarios Cardenal Spínola CEU, Sevilla, Spain; Faculty of Health Sciences, Universidad Francisco de Vitoria, Madrid, Spain.
Background:
In healthy older adults, the two-minute step test (2MST) does not have its concurrent validity tested against the six-minute walk test (6MWT), which is a valid cardiorespiratory fitness test frequently applied in geriatric samples.
Objective:
To derive an equation to predict 6MWT from 2MST and to observe the agreement between observed and estimated 6MWT distances.
Methods:
6MWT and 2MST were measured in 51 older adults (72.9±4.6 years) from community multicomponent exercise programs. Multiple linear regression derives the predictive equation of 6MWT walked distance (dependent outcome) from steps obtained in 2MST, age, sex, and body mass index (independent outcomes).
Results:
Correlation between 6MWT and 2MST was strong (r=0.696, p<0.001). The regression equation showed good agreement with measured values, when 6MWT was below 600 m.
Conclusion:
The equation stands as a novel approach to obtaining a valid 6MWT estimation from the 2MST. 2MST is easier and faster, representing an alternative approach when time and space are limited.
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