LBP	Low-back pain
CLBP	Chronic low-back pain
NP	Nucleus pulposus
AF	Annulus fibrosus
LDHR	Lumbar disc herniation associated with radiculopathy
LDH	Lumbar disc herniation
MMP	Matrix metalloproteinase expression
ECM	Extracellular matrix
DSE	Direction-sensitive exercise
USP	Undesired spinal posture
OSP	Optimum spinal posture
MDT	Mechanical diagnosis and therapy
NSD	Non-surgical spinal decompression
LET	Lumbar extension traction
US	Ultrasound
TENS	Transcutaneous electrical nerve stimulation
IF	Interferential
CTPI	Combination of pulsed ultrasound and interferential current