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[A study on training method for increasing adaptability to blood redistribution in human].
Bin Wu1, Guang-xing You, Ping Wu
1Institute of Space Medico-Engineering, Beijing, China.
Summary
Repeated body position change training enhances human adaptability to blood redistribution. Mode B training proved superior for improving head-down tilt and orthostatic tolerance, suggesting its use in astronaut training.
Area of Science:
- Physiology
- Aerospace Medicine
Background:
- Blood redistribution challenges human adaptability during altered gravity.
- Spaceflight necessitates effective countermeasures for physiological deconditioning.
Purpose of the Study:
- To validate the effectiveness of repeated body position change training on blood redistribution adaptability.
- To identify the optimal training method for enhancing astronaut tolerance to positional changes.
Main Methods:
- Twelve subjects trained using two distinct repeated body position change protocols (Mode A and Mode B) over 11 days.
- Head-down tilt (HDT) and orthostatic tolerance were assessed pre- and post-training to evaluate physiological responses.
Main Results:
- Both training modes improved head-down tilt tolerance, with Mode B showing significantly lower symptom scores and greater heart rate reduction.
- Mode B training also enhanced orthostatic tolerance, evidenced by a significant increase in mean arterial blood pressure and a trend towards smaller heart rate changes.
Conclusions:
- Repeated body position change training effectively improves the human body's adaptability to blood redistribution.
- Mode B emerged as the preferable training method for enhancing both head-down tilt and orthostatic tolerance, indicating its potential application in astronaut training programs.