Submaximal cardiopulmonary thresholds on a robotics-assisted tilt table, a cycle and a treadmill: a comparative analysis

Table 2 Test-retest reliability of the submaximal performance parameters from the RATT, cycle and treadmill

	Overall mean (tests 1 and 2)	MD (95 % LoA)	CoV (%)	ICC (95 % CI)	SEM	%SEM
V′O_2@VAT (L/min) (n = 9)
RATT	1.129	−0.047 (−0.225, 0.131)	5.91	0.92 (0.60–0.98)	0.064	5.67
Cycle ergometer	1.411	0.082 (−0.459, 0.624)	14.10	0.81 (0.39–0.95)	0.195	13.82
Treadmill	1.561	−0.015 (−0.290, 0.259)	6.78	0.98 (0.90–1.0)	0.099	6.34
V′O_2@RCP (L/min)
RATT (n = 6)	1.649	0.094 (−0.208, 0.395)	6.52	0.92 (0.52–0.99)	0.109	6.61
Cycle ergometer (n = 8)	2.344	−0.014 (−0.706, 0.678)	8.66	0.87 (0.47–0.97)	0.245	10.45
Treadmill (n = 7)	2.609	−0.069 (−0.640, 0.502)	7.17	0.95 (0.74–0.99)	0.206	7.90
V′E/V′O_2@VAT (n = 9)
RATT	23.7	−0.01 (−3.5, 3.5)	5.02	0.70 (0.10–0.93)	1.26	5.31
Cycle ergometer	23.4	1.46 (−4.3, 7.2)	9.78	0.62 (0.05–0.90)	2.07	8.87
Treadmill	21.7	0.20 (−2.5, 2.9)	4.33	0.74 (0.19–0.94)	0.97	4.47
VE/V′CO_2@RCP
RATT (n = 6)	28.8	0.70 (−1.0, 2.4)	2.48	0.77 (0.03–0.97)	0.62	2.16
Cycle ergometer (n = 8)	27.7	1.24 (−1.2, 3.6)	4.80	0.90 (0.33–0.98)	0.86	3.10
Treadmill (n = 7)	26.4	−0.97 (−4.6, 2.6)	5.23	0.71 (0.09–0.94)	1.30	4.92
V′E-vs-V′CO₂ slope to RCP
RATT (n = 6)	28.0	0.73 (−4.0, 5.5)	6.00	0.53 (−0.38–0.92)	1.71	6.11
Cycle ergometer (n = 8)	26.4	2.19 (−2.0, 6.4)	8.26	0.75 (0.04–0.95)	1.52	5.77
Treadmill (n = 7)	25.4	−1.14 (−4.3, 2.1)	5.13	0.74 (0.12–0.95)	1.15	4.54

MD mean difference, LoA limits of agreement, CoV coefficient of variation, ICC intraclass correlation coefficient, CI confidence interval, SEM standard error of the measurement

ISSN: 1475-925X