Phase angle as an indicator of health and fitness in patients entering an exercise referral scheme

Steven Mann, Matthew Wade, James Fisher, Jürgen Giessing, Paulo Gentil, James Steele

Research output: Contribution to journalLetter


The loss of function as we age may be related to changes at the cellular level. Recently, attention has been given to measurement of the phase angle (PhA); a noninvasive simple measure using bioelectrical impedance analysis (BIA). Indeed, PhA is considered a valuable indicator of cellular health and, as it is derived purely from electrical properties of the tissue, it avoids typical concerns associated with BIA using prediction equations. PhA is calculated from the arctangent of the ratio between the resistance and reactance from BIA, and a number of studies have evidenced its associations with age and sex, lean body mass, and strength.
Original languageEnglish
Pages (from-to)809-810
JournalJournal of the American Medical Directors Association
Issue number9
Publication statusE-pub ahead of print - Jul 2018


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