Women with stress urinary incontinence (SUI) use different hip biomechanics during gait than women without SUI.
To compare hip angles, moments, and temporal-spatial parameters during gait between women with and without SUI from a control to full-bladder condition.
Case-control study with a repeated-measures design.
Hip angles and moments (net forces) of 19 women with SUI and 23 women without SUI were analyzed during the weight acceptance phase of the gait. Mixed-model analyses of variance were used to compare between groups (SUI, without SUI), conditions (control, full bladder), and limbs (dominant [D], nondominant [ND]). Significance: P < .05.
Women with SUI were older (P < .001), more active (P = .022), produced more offspring (P < .001), used lesser adduction (P = .035; D-limb only), and minimum (P = .01) and peak flexion angles (P = .01), compared with women without SUI. Hip angles (internal rotation [IR]: ND > D, P < .001; external rotation [ER]: D > ND, P = .001), and moments (IR: ND < D, P = .001) differed between limbs. For ER moments, post hoc testing revealed that ND > D were found for women without SUI (P < .001, both conditions) and women with SUI during the control condition only (P = .001). From the control to full-bladder condition, ER angles decreased (P = .012), abduction moments increased (without SUI only; P = .027), extension moments increased (P = .003; D-limb only), step time increased (P = .006), and cadence decreased (P = .007).
Women with SUI did not use different hip moments but used different hip positions during gait compared with women without SUI. Women with and without SUI altered force generation differently in response to bladder stress.
A Video Abstract for this article is available athttps://links.lww.com/JWHPT/A41.