Abstract
Phase angle (PhA), which is calculated from the resistance values obtained by bioelectrical impedance analysis (BIA), has attracted attention as an indicator of ‘muscle quality’. This study demonstrates the mean and percentile values of PhA, categorised by age according to Spirduso (1995), based on our previous study of PhA in the Japanese population (J Physiol Anthropol 44, 8, 2025). The body composition and PhA of 485 Japanese males and 812 females were measured using the multi-frequency BIA method. The 90th-50th-10th percentile values and the means ± standard deviations were provided for the following age groups: young adults (18–24 years), adults (25–44 years), middle-aged adults (45–64 years), young old (65–74 years), old (75–84 years) and old-old (85–95 years). The PhA (in degrees) of males were 7.2–6.5–5.6 and 6.4 ± 0.6 in young adults; 7.1–6.5–5.8 and 6.5 ± 0.6 in adults; 6.7–6.1–5.4 and 6.1 ± 0.6 in middle-aged adults; 6.3-5.7-5.4 and 5.7 ± 0.4 in young old; 5.6-5.1-5.4 and 5.1 ± 0.5 in old; and 5.5-4.8-4.3 and 4.8 ± 0.5 in old-old. For females, 5.8-5.1-4.5 and 5.1 ± 0.5 in young adults; 5.7-5.2-4.4 and 5.1 ± 0.6 in adults; 5.7-5.1-4.6 and 5.2 ± 0.5 in middle-aged adults; 5.6-5.0-4.7 and 5.0 ± 0.5 in young old, 5.3-4.7-4.5 and 4.8 ± 0.5 in old; and 5.3-4.4-4.2 and 4.4 ± 0.5 in old-old. Since PhA is known to vary by race, these data provide a foundation for establishing a Japanese PhA reference value.
Presenters
Kazushige OshitaProfessor, Department of Human Information Engineering, Okayama Prefectural University, Okayama, Japan
Details
Presentation Type
Theme
Public Health Policies and Practices
KEYWORDS
Bioelectrical Impedance Analysis; Body composition, Skeletal muscle; Sarcopenia
