Quantitative analysis of neutral body posture in prolonged microgravity

Area of Science:

• Space medicine
• Human physiology
• Biomechanics

Background:

• Understanding human adaptation to microgravity is crucial for long-duration space missions.
• Previous studies have provided limited quantitative data on body posture in space.
• Anthropometric data is essential for designing safe and effective spacecraft environments.

Purpose of the Study:

• To quantitatively describe the three-dimensional Neutral Body Posture (NBP) and spinal anthropometry in Erect Posture (EP) during a 6-month space flight.
• To analyze changes in NBP joint angles over time in microgravity.
• To compare in-flight spinal length modifications with on-ground data and investigate spinal curvature changes.

Main Methods:

• Utilized opto-electronic technology for quantitative 3D posture analysis.
• Recorded and analyzed joint angles for Neutral Body Posture (NBP).
• Measured spinal length and curvatures (lumbar lordosis, thoracic kyphosis) in Erect Posture (EP).

Main Results:

• Detailed description of NBP joint angle configurations throughout the 6-month mission.
• Observed modifications in spinal length during Erect Posture (EP) in microgravity.
• Documented flattening of the spinal lumbar lordosis and thoracic kyphosis.

Conclusions:

• The study demonstrates the maturity and effectiveness of opto-electronic technology for analyzing posture in microgravity.
• Findings confirm the necessity of expanding the anthropometric database for human postures in weightlessness.
• This data is vital for optimizing the design of permanently inhabited space modules.