Background: Cerebral palsy (CP) is a persistent disorder of movement and posture caused by non-progressive pathological processes of the immature brain. This is the natural history of the gait disorder in children with more severe diplegia and in the majority of children with spastic quadriplegia. One of the most common movement abnormalities among children with cerebral palsy is a crouched gait. Neuromuscular electrical stimulation (NMES) is the application of electrical current transcutaneously to innervated, superficial muscle to stimulate muscle fibers, augment muscle contraction, increase range of motion (ROM), and increase sensory awareness. The purpose of the study was to investigate the effects of NMES on Gluteus maximus and Quadriceps strength in cerebral palsy children with crouch gait, and the subsequent effect on their gross motor function.