Long-term dry immersion: review and prospects.

Area of Science:

• Physiology
• Space Medicine
• Ground-based models

Background:

• Dry immersion is a Russian-developed ground-based model simulating microgravity.
• It involves water immersion with subjects remaining dry via a waterproof fabric.
• This method reproduces key physiological effects of microgravity, such as fluid centralization and unloading.

Observation:

• Dry immersion allows unique study of 'supportlessness', the absence of body support structure.
• It induces physiological changes comparable to actual microgravity and bed rest.
• The review covers effects on neuromuscular, sensorimotor, cardiovascular, metabolic, and other systems.

Findings:

• Long-term dry immersion significantly impacts multiple physiological systems.
• Comparison with bed rest and space flight highlights dry immersion's specific contributions.
• The model effectively simulates microgravity's effects on fluid balance, muscle, and bone.

Implications:

• Dry immersion serves as a valuable tool for fundamental research into microgravity's effects.
• It has potential applications in medical support for astronauts during space flight.
• The model can also inform terrestrial healthcare strategies for conditions involving unloading and immobility.