The aim of this study was to establish reference equations for the six-minute
step test (6MST) based on demographic, anthropometric, body composition, and
performance variables able to predict oxygen uptake (V̇O
2
) in obese
individuals. Seventy-three obese adults (42±14 years old, body mass index >30
kg/m
2
) from both sexes were included. They underwent anamnesis,
body composition evaluation, and the 6MST with expired gases registered
simultaneously. Three equations were developed for the obese population (n=73;
59% female). The first equation was composed of the up-and-down step cycles
(UDS), sex, and age as predictors; the second equation was composed of the UDS,
age, and lean mass (LM). Both equations collectively explained 68.1% of the
V̇O
2
variance in the 6MST, while the third equation, composed of
the UDS, age, and body mass, accounted for 67.7% of the V̇O
2
variance. UDS, sex, age, LM, and body mass were important V̇O
2
predictors of 6MST in these obese individuals. This study contributes to the
dissemination of a simple, inexpensive, and fast evaluation method that can
provide important indicators of cardiorespiratory fitness and guide strategies
for rehabilitation.