The use of in-flight foot pressure as a countermeasure to neuromuscular degradation

The purpose of this study was to determine whether applying foot pressure to unrestrained subjects during space flight could enhance the neuromuscular activation associated with rapid arm movements. Four men performed unilateral arm raises while wearing —or not wearing—specially designed boots durin...

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Bibliographic Details
Published in:Acta astronautica 1998, Vol.42 (1), p.231-246
Main Authors: Layne, C.S., Mulavara, A.P., Pruett, C.J., McDonald, P.V., Kozlovskaya, I.B., Bloomberg, J.J.
Format: Article
Language:English
Subjects:
Adult
Aerospace Medicine
Arm
Electromyography
Foot - physiology
Humans
Male
Middle Aged
Movement
Muscle, Skeletal - physiology
Muscular Atrophy - etiology
Muscular Atrophy - prevention & control
Pressure
Shoes
Space Flight
Space life sciences
Weightlessness - adverse effects
Weightlessness Countermeasures
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Summary:The purpose of this study was to determine whether applying foot pressure to unrestrained subjects during space flight could enhance the neuromuscular activation associated with rapid arm movements. Four men performed unilateral arm raises while wearing —or not wearing—specially designed boots during a 81- or 115-day space flight. Arm acceleration and surface EMG were obtained from selected lower limb and trunk muscles. Pearson r coefficients were used to evaluate similarity in phasic patterns between the two in-flight conditions. In-flight data also were magnitude normalized to the mean voltage value of the muscle activation waveforms obtained during the no-foot-pressure condition to facilitate comparison of activation amplitude between the two in-flight conditions. Foot pressure enhanced neuromuscular activation and somewhat modified the phasic features of the neuromuscular activation during the arm raises.
ISSN:0094-5765
1879-2030
DOI:10.1016/S0094-5765(98)00120-9