AP	anterior-posterior direction
BMI	body mass index
CSA	cross-sectional area
CSE-MRI	chemical shift encoding-based water-fat magnetic resonance imaging
DTI	diffusion tensor imaging
ES	erector spinae muscle
FOV	field of view
GLCM	gray-level co-occurrence matrix
IPACQ-SF	International Physical Activity Questionnaire Short-Form
L2	second lumbar vertebra
L5	fifth lumbar vertebra
LSS	lumbar spinal stenosis
LR	left-right direction
MFI	muscle fat infiltration
MITK	Medical Imaging Interaction Toolkit
MRI	magnetic resonance imaging
MRS	magnetic resonance spectroscopy
MVIC	maximum voluntary isometric contraction
MVICext/flex,	MVIC of extension
MVICext/flex,	MVIC of flexion
[Nm]	newton meter
PDFF	proton density fat fraction
PDFFES	PDFF of erector spinae muscles
PDFFPS	PDFF of psoas muscles
PS	psoas muscle
r	Pearson correlation coefficient
R2adj	adjusted coefficient of determination
ROI	region of interest
SD	standard deviation
SENSE	sensitivity encoding
SI	superior-inferior direction
T	Tesla
T1	longitudinal relaxation time
T2	transverse relaxation time
T2*	effective transverse relaxation time
TA	texture analysis
TE	echo time
ΔTE	echo time step
TR	repetition time