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J Cyst Fibros. 2017 Nov;16(6):744-751. doi: 10.1016/j.jcf.2017.01.012. Epub 2017 Feb 7.

The 1-min sit-to-stand test in cystic fibrosis - Insights into cardiorespiratory responses.

Author information

1
Epidemiology, Biostatistics and Prevention Institute, University of Zürich, Zurich, Switzerland. Electronic address: thomas.radtke@uzh.ch.
2
Paediatric Department, Julius-Maximilians University Würzburg, Wuerzburg, Germany.
3
Epidemiology, Biostatistics and Prevention Institute, University of Zürich, Zurich, Switzerland.

Abstract

BACKGROUND:

We aimed to characterize the cardiopulmonary response during a 1-min sit-to-stand (STS) test and compare peak exercise cardiorespiratory variables to a maximal cardiopulmonary exercise test (CPET) in cystic fibrosis (CF). We further aimed to assess the validity of the STS power index (PowerSTS) as a measure of exercise capacity.

METHODS:

Fifteen adult CF patients performed spirometry, CPET and the 1-min STS test with respiratory gas analysis.

RESULTS:

Peak-exercise cardiorespiratory variables during the 1-min STS test correlated strongly (r=0.69-0.98) with those measured during the CPET. Oxygen uptake, carbon dioxide production, heart rate, ventilation, and tidal volume at peak exercise were 24%, 26%, 9%, 10% and 21% lower in the 1-min STS test, while respiratory frequencies were 14% higher. PowerSTS showed strong to very strong correlations with CPET-derived absolute peak oxygen uptake and maximal workload.

CONCLUSIONS:

The 1-min STS test elicits a substantial but lower cardiorespiratory response compared to a maximal cycle ergometry CPET. While PowerSTS and STS repetitions are both valid outcome measures of functional capacity, STS repetitions are clinically more practical.

KEYWORDS:

Exercise testing; Functional capacity; Lung disease; Validity

PMID:
28188010
DOI:
10.1016/j.jcf.2017.01.012
[Indexed for MEDLINE]

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