Most publications state that core stability exercises (transverse abdominis and multifidus training) can relieve chronic low back pain with or without radiculopathy and improve function, although only temporarily, and may have the same impact as active general exercise so The goal of this study is to detect the effect of retraining the deep core muscles, on pain, disability, and quality of life in patients with chronic Non specific low back pain.

The goal of this study is to detect the effect of retraining the deep core muscles, on pain, disability, and quality of life in patients with chronic Non specific low back pain

This study is delimited to the following aspects:

1. Fifty, patients of only females with chronic non specific low back pain more than 3 months.
2. The age will range from 22 to 45 years.
3. The treatment will conduct to three session per week for four weeks .
4. The selected patients will assigned randomly to two equal groups:

1- Group1 (intervention), will do the selected treatment that include electrical stimulation in addition to Core stability exercises program. 2- Group2(control), will do the conventional treatment only.

Inclusion Criteria:

• gender is women
• age ranges from 22 to45 years old
• chronic non specific low back pain for at least 3 month
• pain score will between 3 to 6 on visual analogue scale

Exclusion Criteria:

• Any deformity of the spine
• Red flags including serious pathology
• Systemic or inflammatory disease
• sever osteoporosis
• history of tumor or cancer
• spine infection
• history of spine or pelvis surgery or fracture
• cauda equina syndrome
• progressive neurological deficit
• severe instability
• sever cardio vascular or metabolic disease
• history of psychological disease
• anatomical and congenital disturbance
• continuous pain more than 8 on (visual analogue scale)

females