Effect of Ground-Based Walk Training in Pulmonary Hypertension
Introduction
Pulmonary hypertension (PH) is a condition defined by a mean pulmonary artery pressure measured at rest >20 mm Hg at a right-sided cardiac catheterization.1 Exercise intolerance is common in PH, caused by incompatible responses of the right and partially the left ventricle, changes in dead space ventilation and ventilation/perfusion mismatch, and decreased peripheral and respiratory muscle strength.2 Recent guidelines suggested that patients with PH should be physically active at the symptom limit and could participate in supervised exercise training while they were stable with medical treatment.3 Supervised exercise training improves skeletal muscle endurance and strength, exercise capacity, and quality of life (QoL) in patients with PH.4 Ground-based walking training (GBWT) was applied safely and an easy-to-apply exercise type when special exercise equipment was not available.5,6 To best of our knowledge, no study has investigated the effect of GBWT in patients with PH. The primary aim of this study was to determine the effect of GBWT on exercise endurance capacity, and the secondary aim was to determine the effect of GBWT on maximal and submaximal exercise capacity, the level of physical activity (PA), quadriceps muscle strength, and QoL in patients with PH.
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Methods
This was a randomized controlled, prospective, and single-blind research. This study was approved by the local Ethics Committee (2018/285) and conducted in accordance with the Declaration of Helsinki. Written informed consent was obtained after explaining the content and purpose of the study to the patients. The study was prospectively recorded on the website “ClinicalTrials.gov” with the study number “NCT03762577.”
A total of 27 patients who agreed to participate in the study and met the
Results
No adverse events were reported by the patients during the assessments and treatment. All patients completed the study as planned. After 8 weeks of walking training, the patients’ condition improved from quite good to much better, according to the Global Rating of Change. The effect size was found as 0.67 according to the change in ESWT.
The demographic and clinical characteristics of the patients and baseline clinical features are presented in Tables 1 and 2. Intra-group changes and the
Discussion
GBWT is a form of endurance exercise training that does not require special equipment. No previous study has investigated the effect of GBWT in patients with PH. The present study demonstrated that GBWT could increase endurance capacity, maximal exercise capacity, and weekly step counts.
The evaluation of endurance exercise capacity is essential for determining the prognosis, functional capacity, symptoms because of effort, and the systemic status of patients with PH.17 To our knowledge, no
Disclosures
The authors have no conflicts of interest to declare.
Acknowledgment
The authors would like to thank Mr. David F. Chapman for the English editing of the manuscript.
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This work was supported by the Istanbul University-Cerrahpasa Scientific Research Projects Unit (Istanbul, Turkey), project number 30146.