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Abstract
Background: Mechanical low back pain is considered as a serious health problem worldwide because it certainly can limit function and capacity in both work and personal life.Purpose: to investigate and compare the efficacy of pulsed electromagnetic field versus low level laser in management of chronic mechanical low back pain. Design : randomized controlled experimental study. Participants: Forty five patients complaining from chronic mechanical low back pain (mean age 34.02±3.251 years, height 168.64±11.989 cm, weight 66.4±11.588 kg, and BMI 23.089±1.819 kg/m²).Methods: Patients were assigned randomly into three equal groups; group )A( received pulsed electromagnetic field plus conventional treatment, group) B( received low level laser therapy plus conventional treatment and group) C( received conventional treatment only in form of infrared radiation and exercise