Comparison of Peak Cardiopulmonary Performance Parameters on a
Robotics-Assisted Tilt Table,a Cycle and a Treadmill |
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Authors: | Jittima Saengsuwan Tobias Nef Marco Laubacher Kenneth J Hunt |
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Abstract: | Robotics-assisted tilt table (RATT) technology provides body support, cyclical
stepping movement and physiological loading. This technology can potentially be
used to facilitate the estimation of peak cardiopulmonary performance parameters
in patients who have neurological or other problems that may preclude testing on
a treadmill or cycle ergometer. The aim of the study was to compare the
magnitude of peak cardiopulmonary performance parameters including peak oxygen
uptake (VO2peak) and peak heart rate (HRpeak) obtained
from a robotics-assisted tilt table (RATT), a cycle ergometer and a treadmill.
The strength of correlations between the three devices, test-retest reliability
and repeatability were also assessed. Eighteen healthy subjects performed six
maximal exercise tests, with two tests on each of the three exercise modalities.
Data from the second tests were used for the comparative and correlation
analyses. For nine subjects, test-retest reliability and repeatability of
VO2peak and HRpeak were assessed. Absolute
VO2peak from the RATT, the cycle ergometer and the treadmill was
(mean (SD)) 2.2 (0.56), 2.8 (0.80) and 3.2 (0.87) L/min, respectively (p
< 0.001). HRpeak from the RATT, the cycle ergometer and the
treadmill was 168 (9.5), 179 (7.9) and 184 (6.9) beats/min, respectively (p
< 0.001). VO2peak and HRpeak from the RATT vs the
cycle ergometer and the RATT vs the treadmill showed strong correlations.
Test-retest reliability and repeatability were high for VO2peak and
HRpeak for all devices. The results demonstrate that the RATT is
a valid and reliable device for exercise testing. There is potential for the
RATT to be used in severely impaired subjects who cannot use the standard
modalities. |
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