Analysis of special protection strategies for astronauts'balance in microgravity environment
Microgravity in space will lead to the decline of astronauts'motor sensation,which will affect the ability of balance maintenance and posture control.Which limits the ability of astronauts to quickly get out of danger in case of extravehicular activities or landing emergencies,and seriously affects the completion of space missions and endangers the safety of astronauts.The current weightlessness countermeasure based on exercise can effectively alleviate the problems of skeletal muscle and cardiovascular system caused by weightlessness to a certain extent,but it cannot effectively prevent the motor sensory dysfunction after space flight.Therefore,new weightlessness countermeasures of special physical conditioning are needed to attenuate the decline of human balance control ability after long-term space flight.By reviewing the previous research results of space flight and simulated weightlessness experiments,this paper systematically analyzes the influencing factors of human body balance control,compares the balance control promotion schemes of special physical conditioning in the field of sports,and puts forward the potential protection strategies for weightlessness environment based on the integration of sports and medicine.The feedback regulation of muscle tension,tactile and proprioceptive play an important role in human posture balance and motion control.The unloading of human gravity load in space weightlessness environment will greatly reduce the input-output feedback regulation activity of the above senses which may lead to balance dysfunction.The post-flight balance control dysfunction may be improved by special physical conditioning,such as loading of z-axial load,enhancement of tactile feedback and proprioceptive response based on unstable mechanical stress stimulation during spaceflight.
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