Results 11 to 20 of about 7,895,299 (362)
Geometric Phase, Hannay's Angle, and an Exact Action Variable [PDF]
Physical Review Letters 85 (2000) 1141-1145, 2000 Canonical structure of a generalized time-periodic harmonic oscillator is studied by finding the exact action variable (invariant). Hannay's angle is defined if closed curves of constant action variables return to the same curves in phase space after a time evolution.
Dae-Yup Song
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Future lines of research on phase angle: Strengths and limitations
Reviews in Endocrine & Metabolic Disorders, 2023 Bioelectrical impedance analysis (BIA) is the most widely used technique in body composition analysis. When we focus the use of phase sensitive BIA on its raw parameters Resistance (R), Reactance (Xc) and Phase Angle (PhA), we eliminate the bias of using
D. Bellido +4 more
semanticscholar +1 more source
Phase angle and cellular health: inflammation and oxidative damage
Reviews in Endocrine & Metabolic Disorders, 2022 Phase angle is a composite measure that combines two raw bioelectrical impedance analysis measures: resistance and reactance. Phase angle has been considered an indicator of cellular health, integrity, and hydration.
Bruna Ramos da Silva¹ +6 more
semanticscholar +1 more source
Role of phase angle in older adults with focus on the geriatric syndromes sarcopenia and frailty
Reviews in Endocrine & Metabolic Disorders, 2022 Age-related changes in body composition reflect an increased risk for disease as well as disability. Bioimpedance analysis is a safe and inexpensive bed side method to measure body composition, but the calculation of body compartments with BIA is ...
K. Norman, C. Herpich, U. Müller-Werdan
semanticscholar +1 more source
Association of phase angle and running performance [PDF]
Clinical Nutrition ESPEN, 2020 A high phase angle derived from bioelectrical impedance analysis has been linked to a high level of physical activity. However, it is unknown whether a high phase angle is related to running performance.We included all subjects who participated for the first time to the Course de l'Escalade between 1999 and 2016, a yearly city run occurring in Geneva ...
Laurence Genton +7 more
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Phase angle from bioelectrical impedance analysis is a useful indicator of muscle quality
Journal of Cachexia, Sarcopenia and Muscle, 2021 Methods that facilitate muscle quality measurement may improve the diagnosis of sarcopenia. Current research has focused on the phase angle (PhA) obtained through bioelectrical impedance analysis (BIA) as an indicator of cellular health, particularly ...
Y. Akamatsu +10 more
semanticscholar +1 more source
Sarcopenia in Non-Dialysis Chronic Kidney Disease Patients: Prevalence and Associated Factors
Frontiers in Medicine, 2022 BackgroundSarcopenia is related to morbidity and mortality in non-dialysis Chronic Kidney Disease (ND-CKD) patients; however, the pathophysiology of sarcopenia remains unclear.
Geraldo José de Amorim +12 more
doaj +1 more source
Frontiers in Medicine, 2021 Background: In recent studies, the usefulness of the phase angle (PA) to assess geriatric conditions such as sarcopenia and frailty has been evaluated.
Oscar Rosas-Carrasco +3 more
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PLoS ONE, 2022 Introduction We aimed to evaluate the association between the phase angle and muscle mass, muscle strength, physical performance tests, quality-of-life scales, mood scales, or patient and hospitalization-free survival rates in hemodialysis (HD) patients.
S. Kang, J. Do, J. C. Kim
semanticscholar +1 more source
Frontiers in Nutrition, 2022 BackgroundThe study aimed to investigate the association of bioelectrical impedance analysis (BIA) for predicting clinical outcomes in critically ill children.MethodsThis single-center prospective observational study included patients admitted to a mixed
Zi-Hong Xiong +5 more
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