ARP	Activity-Related Pain questionnaire
BARSE	Barriers Self-Efficacy Scale
BBQ	Back Belief Questionnaire
BDI	Beck Depression Inventory
BIPQ	Brief Illness Perception Questionnaire
BREQ-2	Behavioural Regulation in Exercise Questionnaire
CG	Control Group
CNS	Central nervous system
CONNECT	Communication Style and Exercise Compliance in Physiotherapy
d	Days
CS	Classification-Specific Treatment
EARS	Exercise Adherence Rating Scale
EBPC	Evidence-Based Physiotherapy Care
ESEQ	Exercise Self-efficacy Questionnaire
ET	Exercise Therapy
EurQoL	European Quality of Life Questionnaire
FABQ	Fear Avoidance Beliefs Questionnaire
FU	Follow-Up
GDS	Geriatric Depression Scale
GSC	General Strength and Conditioning
h	Hours
HADS	Hospital Anxiety and Depression Scale
HEP	Home-Exercise Program
HLC	Health Locus of Control questionnaire
IPAC	International Physical Activity Questionnaire—Short Form
LBOSQ	Low Back Outcome Scale Questionnaire
LBRS	Low Back Rating Scale
LL	Lower Limb
MAI	Multidimensional Adherence Index
MCMT	Motor Control Exercise and Manual Therapy
MSI	Movement System Impairment-Based Classification Model
MSPQ	Modified Somatic Perception Questionnaire
NC	Non-Classification-Specific Treatment
nsCLBP	Non-Specific CLBP
N(P)RS	Numeric (Pain Rating Scale)
OEES	Outcome Expectations for Exercise Scale
(m)ODI	(modified) Oswestry Disability Index
PALQ	Physical Activity Level Questionnaire
PANAS	Positive and Negative Affect Schedule
PCS	Pain Catastrophising Scale
PDI	Psychological Distress Inventory
PGRS	Pain Graphic Rating Scale
PT	Physiotherapist
PSFS	Patient-Specific Functional Scale
PSQ	Patient Satisfaction Questionnaire
QBPDS	Quebec Back Pain Disability Scale
RMDQ	Roland–Morris Disability Questionnaire
SF-36	Short-Form Health Survey
SIRAS	Sports Injury Rehabilitation Adherence Scale
SIRBS	Sports Injury Rehabilitation Beliefs Scale
SPPB	Short Physical Performance Battery
TSK	Tampa Scale for Kinesiophobia
TSRQ	Treatment Self-Regulation Questionnaire
WAI	Work Alliance Inventory
w/wo	With or Without