Phase Angle as a Marker of Muscular Strength in Breast Cancer Survivors

Catarina N. Matias, Joana Cavaco-Silva, Mafalda Reis, Francesco Campa, Stefania Toselli, Luís Sardinha and Analiza M. Silva
Additional contact information
Catarina N. Matias: Exercise and Health Laboratory, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, 1499-002 Lisboa, Portugal
Joana Cavaco-Silva: ScienceCircle-Scientific and Biomedical Consulting, 1600 544 Lisboa, Portugal
Mafalda Reis: Exercise and Health Laboratory, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, 1499-002 Lisboa, Portugal
Francesco Campa: Department for Life Quality Studies, University of Bologna, 47921 Rimini, Italy
Stefania Toselli: Department of Biomedical and Neuromotor Science, University of Bologna, 40126 Bologna, Italy
Luís Sardinha: Exercise and Health Laboratory, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, 1499-002 Lisboa, Portugal
Analiza M. Silva: Exercise and Health Laboratory, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, 1499-002 Lisboa, Portugal

IJERPH, 2020, vol. 17, issue 12, 1-10

Abstract: Background: accurate prognostic tools are relevant for decision-making in cancer care. Objective measures, such as bioelectrical impedance (BI), have the potential to improve prognostic accuracy for these patients. This cross-sectional study aimed to investigate whether phase angle (PhA) derived from the electrical properties of the body tissues is a predictor of muscular strength in breast cancer survivors (BCS). Methods: a total of 41 BCS (age 54.6 ± 9.2 years) were evaluated. PhA, obtained at frequency 50 kHz, was assessed with BI spectroscopy, and muscular strength with a handgrip dynamometer. Moderate-to-vigorous physical activity (MVPA) was assessed using the International Physical Activity Questionnaire (IPAQ). Measurements were performed in the morning after an overnight fast. Results: linear regression analysis showed that PhA accounted for 22% (r 2 = 0.22) of muscular strength variance. PhA remained a borderline predictor of muscular strength variance independently of age and MVPA. Conclusions: the findings of this study suggest that PhA is a significant predictor of maximal forearm isometric strength and a potential indicator of disease-related functionality in BCS.

Keywords: body composition; breast cancer; bioimpedance; handgrip strength (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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