IRCT2016080620888N6 IRCT 2016-10-18 Isfahan University of Medical Sciences, Vice Chancellory of Research and Technology Comparing the Effects of Standard Rehabilitation Protocol and Standard Rehabilitation Protocol in Combination with Exercise Therapy in Subjects with Acute Low Back Pain Comparing the Effects of Standard Rehabilitation Protocol and Standard Rehabilitation Protocol in Combination with Exercise Therapy, on Functional Disability and Pain in Subjects Affected by Non Specific Low Back Pain 2015-04-30 anticipated 40 Complete https://irct.ir/trial/18445 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization using random numbers table. 2 Acute Nonspecific Low Back Pain. Intervention 1: Intervention Group: this group will receive standard treatment including education to stay active, self-management, lumbar school (a pamphlet is used), manipulation in the first two sessions and 30 minutes of transcotaneus electrical nerve stimulation (TENS) in each session. The standard protocol will be administered by the same physical therapist for all the subjects who is blind to the study design. The experimental group will also take part in 8 sessions of active exercises. The exercises are either flexor or extensor muscle endurance training according to the physical evaluation, subject' condition and subject' symptoms. Each exercise will be repeated three boats a day. The exercise will be cancelled and omitted if it aggravates the symptoms. Training progression is according to subjects' capabilities. A physical therapist who is blind to the study design will supervise the exercises. The exercises are kinesthetic (anterior and posterior pelvic tilt), mobility and flexibility (knee to chest, prone extension), muscle performance (drawing in maneuver, alternating flexion/extension of the upper extremities and heel slide) and functional (walking). Intervention 2: Control Group: this group will receive standard treatment including education to stay active, self-management, lumbar school (a pamphlet is used), manipulation in the first two sessions and 30 minutes of transcotaneus electrical nerve stimulation (TENS) in each session. The standard protocol will be administered by the same physical therapist for all the subjects who is blind to the study design.