Ethnic differences in pelvic floor muscle strength and endurance in South African women

Abstract

Limited knowledge exists about pelvic floor muscle (PFM) function in ethnic groups. The aim of this study was to compare PFM strength and endurance in a group of black, white and mixed-race women. This was a cross-sectional study. Maximum voluntary contraction (MVC) and endurance were measured with a perineometer and vaginal balloon sensor. Two sets of three MVC of the PFM were recorded; resting phase was 5 min. Demographic variables and factors associated with PFM strength were assessed. A total of 122 nulliparous black (n = 44), white (n = 44) and mixed-race (n = 34) students participated. PFM of black women were stronger than that of white (p = 0.02) or mixed-race (p < 0.01) women. The MVC of PFM in black women decreased (p = 0.02) between the first and second set of contractions. Ethnic differences were found. Further clinical studies are needed to confirm an association between PFM function and pelvic floor disorders.