The problem of this study concerns the reduction of spasticity in physically handicapped persons with CP. The hypotheses tested were: that there would be no significant difference between the mechanical efficiency (ME) of persons with spastic CP following application of the TENS Unit and following application of the placebo unit; that there would be no significant difference between the ME of males with spastic CP, following application of the TENS Unit or the placebo unit, and the ME of females with spastic CP, following application of the TENS Unit or the placebo unit; and that there would be no significant interaction between the treatment factor and the gender category.