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Body Planes01:06

Body Planes

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Body planes in anatomy are imaginary flat surfaces used as reference points to divide the body into sections for anatomical study. These planes are essential for understanding the orientation, relationships, and spatial organization of anatomical structures.
The sagittal plane is the plane that divides the body or an organ vertically into right and left sides. If this vertical plane runs directly down the middle of the body resulting in equal division, it is called the midsagittal or median...
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Segmentation and Linear Measurement for Body Composition Analysis using Slice-O-Matic and Horos
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Phase angle and body composition: A scoping review.

Priscila Custódio Martins1, Carlos Alencar Souza Alves Junior1, Analiza Mónica Silva2

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|June 21, 2023
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Summary

Phase angle (PhA) is directly linked to lean and muscle mass across all ages and health statuses. Evidence is insufficient to confirm associations with body fat, requiring further research.

Keywords:
Bioelectrical impedanceCellular healthPhysical fitness

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Area of Science:

  • Biomedical Sciences
  • Human Physiology
  • Nutritional Science

Background:

  • Phase angle (PhA) is a bioelectrical impedance analysis (BIA) parameter reflecting cell membrane integrity and cellular integrity.
  • Body composition assessment is crucial for understanding health status and disease prognosis.
  • The relationship between PhA and various body composition components requires comprehensive evidence mapping.

Purpose of the Study:

  • To systematically map and synthesize evidence on the association between phase angle (PhA) and body composition.
  • To analyze these associations across diverse populations, including healthy and clinical groups.
  • To identify research gaps regarding PhA and body composition metrics.

Main Methods:

  • A systematic literature search was conducted across nine electronic databases from October to November 2021.
  • Studies examining the relationship between PhA and body composition metrics (e.g., BCM, lean mass, fat mass) were included.
  • Data extraction and synthesis were performed on 59 selected studies, encompassing a wide age range and various health conditions.

Main Results:

  • A direct association between PhA and lean mass, muscle mass, and fat-free mass was consistently observed across all age groups and health statuses.
  • Evidence regarding the association between PhA and body fat mass was inconclusive, with studies reporting inverse, direct, and no relationships.
  • A significant portion of the included studies (40.67%) originated from Brazil, and 25.42% employed a longitudinal design.

Conclusions:

  • Phase angle is a reliable indicator directly associated with muscle and lean mass in children, adolescents, adults, and older adults.
  • The association between PhA and body fat requires further investigation due to conflicting evidence.
  • The findings highlight the importance of PhA in assessing muscle health across the lifespan and in various clinical contexts.