Measurement properties of the six-minute pegboard and ring test (6PBRT) in healthy adolescents

To investigate the cardiorespiratory responses to the 6-min pegboard and ring test (6PBRT) and to assess its reproducibility in healthy adolescents. It was a cross-sectional study with 52 healthy adolescents (11–18 years old of both genders). The 6PBRT was performed twice on two different days by the same examiner. Intra-rater reliability, percentage of the minimal difference chance (MDC%) and agreement of the number of moving rings were analyzed. Also, cardiopulmonary parameters were collected before and after tests. Intraclass correlation coefficient (ICC) for the number of rings moved was 0.87 (95%CI 0.69–0.93). The mean number of moved rings during the second test was higher. The MDC% with a 95 % confidence interval was greater than acceptable values. Bland-Altman analysis did not show agreement between measurements (bias = 30.1); with upper and lower limits of agreement of −67.8 to 127.9, respectively. There was a significant increase in dyspnea, fatigue and HR values at the end of the tests (p