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Publication
Relationship between heart rate variability and functional fitness in breast cancer survivors: a cross-sectional study
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Advisor(s)
Abstract(s)
Background: Breast cancer is the most common malignancy among women worldwide.
The treatments may also cause neuromuscular and skeletal disorders; therefore, the aim of this
study was to verify the existence of a relationship between heart rate variability and different
functional fitness parameters in women survivors of breast cancer. Methods: This cross-sectional
study included 25 women survivors of breast cancer, with a mean SD age, height, and body mass
of 50.8 8.8 years, 1.6 0.7 m, and 67.1 12.3 kg, respectively. Patients underwent measurements
of heart rate variability with time and frequency domain analyses, as well as a “30 s chair-stand test”,
“6 min walking test”, “timed up and go test”, and “ball throwing test”. Results: A multiple linear
regression analysis showed that from the heart rate variability frequency domain, high frequency
explained 21% (R2 = 0.21) of the “30 s chair-stand test” performance. Conclusion: The findings of this
study highlight high frequency as a predictor of “30 s chair-stand test” performance, regardless of
age and time after diagnosis, suggesting its usefulness as a clinical indicator of functionality in breast
cancer survivors. This study presents a straightforward and non-invasive methodology predicting
functional fitness in women breast cancer survivors potentially applicable to clinical practice.
Description
Keywords
breast cancer heart rate variability fitness exercise parasympathetic nervous system
Citation
Martins, A.D.; Brito, J.P.; Oliveira, R.; Costa, T.; Ramalho, F.; Santos-Rocha, R.; Pimenta, N. (2021). Relationship between heart rate variability and functional fitness in breast cancer survivors: a cross-sectional study. Healthcare, 9, 1205. https://doi.org/ 10.3390/healthcare9091205
Publisher
MDPI