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Related Concept Videos

Anatomical Positions01:11

Anatomical Positions

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In anatomy, several standard anatomical positions are used as references for describing the position and orientation of different body parts. These positions help provide a common frame of reference when discussing anatomical structures. The anatomical position is the standard reference point for describing the body's position and orientation. In this position:
The body is upright, facing forward, and standing erect.
The feet are parallel and flat on the floor.
The arms are hanging by the...
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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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Postural and spinal stability analysis for different floor sitting styles.

Seung Nam Min1, Murali Subramaniyam2, Mohammad Parnianpour3

  • 1Department of Smart Safety System, Dongyang University, 2784, Pyeonghwa-ro, Dongducheon-si, Gyeonggi-do, Republic of Korea.

Heliyon
|September 19, 2024
PubMed
Summary

Floor seating and kneeling postures may improve balance and reduce trunk muscle fatigue, especially in Asian populations. This study highlights the need for culturally relevant ergonomic research beyond Western chair-sitting norms.

Keywords:
Floor seatingPostural stabilitySeating posturesTrunk muscle activity

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Area of Science:

  • Ergonomics
  • Biomechanics
  • Cultural Anthropology

Background:

  • Western-centric research on sitting posture overlooks traditional floor-seating cultures prevalent in Asia.
  • Existing studies predominantly focus on chair sitting, creating a cultural bias in ergonomic understanding.

Purpose of the Study:

  • To investigate the impact of various floor cushion types and seating postures on postural stability in an Asian population.
  • To analyze effects on trunk muscle activity, spinal stability, and subjective comfort.

Main Methods:

  • Recruited 40 healthy, right-hand/foot-dominant volunteers from an Asian population.
  • Utilized repeated-measures MANOVA and ANOVA to assess cushion types (3-cm, 5-cm, 8-cm) and postures (cross-legged, mother's leg, kneeling).
  • Measured postural stability, trunk muscle activity, rotational spinal stability, and subjective stability.

Main Results:

  • Preventing lordosis posture, floor seating, and kneeling postures were associated with reduced loss of balance.
  • These postures also indicated a decrease in trunk muscle fatigue.
  • Cushion thickness and specific posture variations showed significant effects on stability and muscle activity.

Conclusions:

  • Floor seating, particularly kneeling, and maintaining a neutral spine (preventing lordosis) can enhance postural stability and reduce muscle fatigue.
  • Findings underscore the necessity for culturally-specific ergonomic research focusing on Asian seating traditions.
  • Results suggest practical implications for designing culturally appropriate seating solutions.