Non-Powered automatic velocity-controlled wheeled walker improves gait and satisfaction in patients with hip fracture when walking downhill: A cross-over study

•NPAVEC wheeled walker is more suitable than a four-wheeled walker for patients after surgery for hip fracture.•Patients’ lower limb activity increased on walking downhill using the NPAVEC wheeled walker.•User satisfaction improved on using the NPAVEC wheeled walker when walking downhill. A standard four-wheeled walker is commonly used after surgery for hip fracture to aid ambulation. However, elderly patients experience some difficulties and are at risk for falls; therefore, attempts are being made to address these issues. Does the non-powered automatic velocity-controlled (NPAVEC) wheeled walker improves the gait and satisfaction of patients with hip fractures when walking downhill using it? In this cross-over study, 21 participants performed three trials of walking downhill with two walkers (an NPAVEC wheeled walker and a standard four-wheeled walker) at a self-selected speed. We compared the lower limb surface electromyography data and self-reported satisfaction scores for both walkers. Regarding the affected limb, the NPAVEC wheeled walker increased contraction in the vastus medialis (p = 0.003) and tibialis anterior (p = 0.014), and biceps femoris of the unaffected limb (p = 0.01). Additionally, participants reported greater satisfaction when using the NPAVEC wheeled walker (p < 0.001). An NPAVEC wheeled walker, compared to a four-wheeled walker, can assist patients recovering from hip fracture when walking downhill by improving the gait and increasing satisfaction.