Hip work boosted pelvic floor strength gains

Stress and mixed urinary incontinence affect a large number of women and meaningfully dent quality of life, and supervised pelvic floor muscle training is the accepted first-line conservative approach. The problem is that a proportion of women struggle to produce or sustain a correct contraction, which limits how much the training can deliver. That has prompted interest in add-ons that might recruit the pelvic floor indirectly or drive it artificially, including hip rotator strengthening and intravaginal electrical stimulation. This trial asked whether either adjunct improves outcomes beyond biofeedback-assisted pelvic floor training on its own.

Sixty women aged 30-65 with stress or mixed urinary incontinence were randomised into three groups: biofeedback-assisted pelvic floor muscle training alone (n=17), the same training plus hip rotator strengthening (n=19), and the same training plus intravaginal electrical stimulation (n=19). The intervention ran for six weeks of supervised exercise. Primary outcomes were pelvic floor muscle strength measured by perineometer, the Oxford Grading Scale, and myoelectric activity on EMG. Quality of life was captured with the I-QoL questionnaire. Fifty-five participants completed the study, and data were analysed with ANOVA and Kruskal-Wallis tests.

All three groups improved significantly on every outcome from their own baseline, which is the expected effect of supervised pelvic floor training itself. The between-group analysis showed a significant difference in pelvic floor muscle strength, and the hip strengthening group came out best, with a mean difference of 4.44 cm H2O over training alone and a large effect size. Compared with the electrical stimulation group, the advantage was smaller. Crucially, the adjunct groups' improvements in Oxford Grading Scale scores and I-QoL quality of life were greater but not statistically significant, so the clearest separation between arms was on measured strength rather than on graded function or self-reported symptoms.

The finding supports the existing view that biofeedback-assisted pelvic floor training works, and extends it by suggesting hip musculature is a plausible lever on pelvic floor force production rather than a distraction from it. It complicates the picture in one respect: a strength gain on a perineometer did not translate into a significant between-group quality-of-life advantage within six weeks, which may reflect the short duration, the modest group sizes or a genuine gap between force and symptom relief. Whether the hip advantage persists, and whether it eventually shows up in continence outcomes, is untested here.

This is a reason to think that pelvic floor work and hip strength are related rather than separate projects, and that supervised, biofeedback-guided training is the core of the effect in either case. It is not evidence that hip exercises can replace pelvic floor training, since every group in this trial did the pelvic floor work. The absence of a significant group difference in quality of life is a reminder that a measurable strength change does not automatically mean fewer symptoms. Anyone dealing with incontinence would still be looking at a supervised programme rather than self-selected add-ons.