Volume 8, Issue 1, March 2020, Page: 10-16
Composition of Change in Phase Angle with Age in Japanese Children
Katsunori Fujii, Graduate School of Business Administration and Computer Science, Aichi Institute of Technology, Toyota City, Aichi, Japan
Kentaro Hayakawa, Child Studies, Nagoya Management Junior College, Owariasahi City, Aichi, Japan
Received: Feb. 17, 2020;       Accepted: Feb. 26, 2020;       Published: Mar. 10, 2020
DOI: 10.11648/j.ajss.20200801.12      View  224      Downloads  103
Phase angle (PhA) is a value derived from the resistance (R) in intra- and extracellular fluid and the reactance (Xc) in the cell membrane, measured by bioelectrical impedance analysis (BIA). It has also been referred to as a nutritional index that shows the level of cellular activation, becoming a focus of attention in recent years. However, very little is known about the changes in phase angle with age, particularly the changes that occur during the school-age years. In this study, we investigated whether phase angle has a maximum peak velocity (MPV) similar to that of physique, and if a pubertal peak exists whether it is meaningful as a biological parameter in the same way as height growth. The results showed that the age at MPV of phase angle may be proposed as a critical point in the acquisition of health with stronger physical growth and development during the school-age years. Assuming that MPV of phase angle is a critical point in physical growth and development, its involvement in disease needs to be closely observed with this critical point as a juncture since this is also a time period when the thymus of the immune system shows a pubertal peak. At the same time, beyond the pubertal peak of physique, this may be considered a period during which more adult-like physical enhancement and level of health is maintained.
Phase Angle, Bioelectrical Impedance Analysis (BIA), Maximum Peak Velocity (MPV), Wavelet Interpolation Model
To cite this article
Katsunori Fujii, Kentaro Hayakawa, Composition of Change in Phase Angle with Age in Japanese Children, American Journal of Sports Science. Vol. 8, No. 1, 2020, pp. 10-16. doi: 10.11648/j.ajss.20200801.12
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