Abstract.[Purpose] The purpose of this study was to compare the effect of birth history and delivery method on vaginal pressure and abdominal muscle activity during pelvic floor muscle contraction (PFMC).[Subjects] Thirty healthy female volunteers (26~39 years of age) were selected for the research. Their delivery histories were: nulliparous 10, vaginal delivery 10 and cesarean delivery 10. None of the participants had a history of incontinence.[Methods] Abdominal muscle activities and vaginal pressure were recorded in the crook-lying position. During pelvic floor muscle contraction.[Results] Pelvic floor muscle contractions induces significantly different vaginal pressures between subjects with nulliparous and vaginal delivery histories (p<0.05), but no significant difference in vaginal pressure was induced between the vaginal delivery group and cesarean delivery group. [Conclusion] Pelvic floor muscle contraction induced no significant differences in electromyography in each group
Abstract.[Purpose] The purpose of this study was to verify the effect of a Pelvic Floor Muscle exercise program by comparing muscle activities at different ages, using biofeedback to regulate vaginal pressure.[Subjects] Two groups of female participants without medical history of pelvic floor muscle dysfunction were evaluated. The mean age of Group I was 33.5 years and that of Group II 49.69 years.[Methods] Participants were instructed to perform the pelvic floor muscle exercise. Biofeedback was given for vaginal pressure of the pelvic floor muscles, and we measured the activities of the rectus abdominis, external oblique, and internal oblique muscles by electromyogram at 5 different levels of vaginal pressure. [Results] In Group II, as the vaginal pressure increased, the internal oblique values showed significant differences. When the vaginal pressure was 20 cmH 2 O, 30 cmH 2 O, and Maximum, the muscle activities of Group II increased significantly more than in Group I. [Conclusion] When the pelvic floor muscles were contracted, Group I showed greater differences in the internal oblique muscle activity than Group II.
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