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A Study Comparing the Effectiveness of Polar Ignite® Estimated VO2max to Conventional Cardiopulmonary Exercise Testing in Pediatric Patients with Normal Cardiac Anatomy and Fontan
American Journal of Pediatrics
Volume 9, Issue 2, June 2023, Pages: 79-84
Received: April 19, 2023; Accepted: May 17, 2023; Published: May 29, 2023
Brian Hernandez, Department of Pediatric Cardiology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
Bailey Roberts, Department of Pediatric Cardiology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
Erica Jamello-Comer, Pediatrics, St. St. Louis Children's Hospital Louis, Missouri, United States
Anusha Kodidi, Pediatrics, St. St. Louis Children's Hospital Louis, Missouri, United States
for lisa ro, Department of Pediatric Cardiology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
Nathan Miller, Electrophysiology Laboratory, St. Louis Children's Hospital, St. Louis, MO, USA
Lauren Little, Department of Pediatric Cardiology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
echaybara, Department of Pediatric Cardiology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
Jonathan Silva, Department of Biomedical Engineering, McKelvey School of Engineering, Washington University, St. Louis, MO, USA
jennifer silva, Department of Pediatric Cardiology, Washington University School of Medicine, St. Louis, MO; Department of Biomedical Engineering, McKelvey School of Engineering, Washington University, St. Louis, MO, USA
william arr, Department of Pediatric Cardiology, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
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Cardiorespiratory fitness, expressed as VO2max, is considered the best indicator of overall cardiovascular fitness. Fitness technologies such as wrist-worn devices now offer an easy way to monitor an individual's VO2max. This study aimed to compare VO2max estimates from a Polar Ignite (Polar Electro Oy, Kempele, Finland) fitness watch (Polar Ignite) with the gold standard cardiopulmonary exercise test (CPET) in pediatric patients with normal cardiac anatomy and Fontan. This prospective single-center study enrolled 13- to 21-year-old patients with normal cardiac anatomy and single ventricle patients receiving Fontan palliative care (Fontan). The Polar Ignite is attached to the patient's right or left wrist in supine position and the estimated VO2max is generated from a test without exercise (Polar Fitness Test). Voluntary maximal CPET using the standard Bruce treadmill protocol was then completed. The measurements of the two tests were compared using the intraclass correlation coefficient (ICC), the Pearson correlation coefficient, and the Bland-Altman method. Forty-seven patients were included, including n=36 (77%) normal cardiac patients and n=11 (23%) Fontan patients. Most participants were white (n=41, 87%) and female (n=36, 66%). The age of the patient was 15.3±1.9 years old, the weight was 65.7±16.6 kg, and the height was 168.0±10.4 cm. The estimated mean values of VO2max for Polar Ignite and CPET were 43.9±6.1 ml/kg/min vs 37.7±8.2 ml/kg/min, respectively, and 42.6±3.9 ml/kg/min vs 22.6±5.6 ml/min for normal heart group kg/min, respectively, in the Fontan group. We found a low validity (ICC=0.21) and weak correlation (r=0.84, p=0.07) between VO2max measured by Polar Ignite and CPET in the normal heart group. Correlation (r=0.31, p=0.07) p=0.001) in the Fontan group. In the Bland-Altman analysis, the mean deviation between Polar Ignite and CPET measured VO2max was 6.85 ml/kg/min in the normal heart group and 20.05 ml/kg/min in the Fontan group. In the normal heart and Fontan groups, Polar Ignite overestimated VO2max compared to CPET and is not a substitute for formal testing.
Wearables, cardiopulmonary exercise testing, VO2max, Fontan
cite this article
Brian Hernandez, Bailey Roberts, Erika Jamello-Comer, Anusha Kodidi, Lisa Basil, Nathan Miller, Lauren Little Al, Echa Ibarra, Jonathan Silva, Jennifer Silva, William Orr. A Validity Study of Polar Ignite® Estimating VO2max Compared to Conventional Cardiopulmonary Exercise Testing in Pediatric Patients with Normal Cardiac Anatomy and Fontan,American Journal of Pediatrics. Volume 9, Issue 2, June 2023, pp. 79-84. doi: 10.11648/j.ajp.20230902.15
Copyright © 2023 The author reserves the copyright for this article.
This article is licensed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited.
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