BACKGROUND :The incremental shuttle walk test (ISWT) and six-minute walk test (6MWT) assess cardiorespiratory endurance in sedentary populations, with the ISWT being externally paced and the 6MWT self-paced. This study aimed to evaluate whether both tests produce comparable cardiorespiratory responses.

METHODS :100 healthy sedentary adults (18–59 years) from Cipto Mangunkusumo Hospital completed both tests. Outcomes measured included distance traveled, maximal heart rate (HRmax), and Borg scale scores (rating of perceived exertion [RPE], dyspnea, and leg fatigue).

RESULTS :Of 100 sedentary adults (25 men, 75 women), the ISWT resulted in significantly longer walking distances (p<0.001), higher post-test Borg dyspnea scores (median [interquartile range]: 2 [1–3]) versus 1 [0–2]; p = 0.024), and the higher HRmax (70.9 [9.2%] bpm versus 67.9 [10.9%] bpm; p = 0.004) compared to the 6MWT. No significant differences were observed in other parameters, and Bland–Altman analysis revealed no proportional bias for Borg leg fatigue scores (p = 0.561).

CONCLUSIONS :In healthy sedentary adults, the 6MWT and ISWT showed no agreement in distance traveled, Borg dyspnea scale scores, or HRmax, but they agreed on Borg leg fatigue scores.