AStudy on Enhanced Counterpressure Effect of Capstan Pressure Jerkin

In order to enhance the counterpressure effect of capstan pressure jerkin,breathing bladderwas added under the jerkin.Tests of positive pressure breathing(PPB) and altitude explosive decom-pression were conducted.The results showed that the counterpressure effect of the capsstan jerkin withbladder was significantly improved.The bladder increased the expiratory counterpressure at the chest.The amplitude and integration of EMG when jerkin with bladder was worn(groups B,C)were signif-icantly lower(P0.01) than those when jerkin without bladder was worn(group A).The bladderreduces breath fatigue and enhances communication intelligibility diring PPB.