ABSTRACT
Objective To study balance function and surface electromyography (sEMG) activity of erector spinae (ES) and rectus ab-dominis(RA)in stroke patients.Methods From April,2015 to December,2016,17 stroke patients(test group)and 13 healthy subjects(con-trol group)were tested with balance platform:sitting with eyes open/close,with the platform swing of 10°,with trunk flexion and extension in maximum.The root mean square(RMS)of sEMG was recorded on both sides of ES and RA synchronously.The swing length and area of center of mass,the center of pressure on X and Y axes were also recorded as sitting with eyes open/close.Results For the test group,RMS of bilateral ES was significantly different as sitting with eyes open/close and with trunk flexion and extension in maximum (t>2.173, P<0.05).Compared with the control group,RMS of ES and RA in unaffected side increased as sitting with eyes open/close(t>2.175,P<0.05), as well as the swing length and area of center of mass(t>2.760,P<0.05).Conclusion The strength imbalance is found in ES in stroke pa-tients,which may associate with the balance function impairment,and need to be improved in rehabilitation.
ABSTRACT
With the advancement of manned space science and technology,the scope of human exploration into outer space has been gradually expanded.The time and distances that astronauts flight on-board are becoming longer and longer.However,long-term microgravity can negatively affect astronauts' physical and psychological aspects,thus influencing their health and leading to the failure of work tasks,and even threatening their lives.This paper reviews USA,Russia and Europe research results in the field of astronauts on-board physical training methods and health protection measures,with the purpose of learning from their successful experience.Overall,it is suggested that for cross complementation in sport science,we should make the introduction of advanced and successful training systems to solve problems existing in astronauts on-board training,ensuring the maintenance of health.