ABR	Advanced Biomechanical Rehabilitation
BDNF	Brain-Derived Neurotrophic Factor
BMI	Body Mass Index
cFTOE	Cerebral Fractional Tissue Oxygen Extraction
CHb	Cerebral Total Hemoglobin
CHU Sainte-Justine	Centre Hospitalier Universitaire Sainte-Justine
CPET	Cardiopulmonary Exercise Testing
CV	Coefficient of Variation
DSQ	DePaul Symptom Questionnaire
EDTA	Ethylenediaminetetraacetic Acid
ELISA	Enzyme-Linked Immunosorbent Assay
FDR	False Discovery Rate
FGF21	Fibroblast Growth Factor 21
g	Gravity or Relative Centrifugal Force
GlcN	Glucosamine
Hb	Hemoglobin
HBP	Hexosamine Biosynthetic Pathway
HPLC	High-Performance Liquid Chromatography
Hp	Haptoglobin
Hz	Hertz
ICanCME	Interdisciplinary Canadian Collaborative Myalgic Encephalomyelitis (ICanCME) Research Network
LC	Long COVID
LC-MS	Liquid Chromatography-Mass Spectrometry
LRP-1	Low-Density Lipoprotein Receptor-Related Protein-1
ME	Myalgic Encephalomyelitis
MFI-20	Multidimensional Fatigue Inventory-20
MHz	Megahertz
NIRS	Near-Infrared Spectroscopy
O-GlcNAc	O-linked β-N-acetylglucosamine
PASC	Post-Acute Sequelae of SARS-CoV-2 Infection
PBQC	Pooled Biological Quality Control
PEM	Post-Exertional Malaise
Psi	Pounds Per Square Inch
R2	Coefficient of Determination
rSO2	Regional Cerebral Oxygen Saturation
RT	Retention Time
SARS-CoV-2	Severe Acute Respiratory Syndrome Coronavirus 2
SC	Short-Course COVID
SEM	Standard Error of the Mean
SF-36	Short Form-36 Health Survey
SpO2	Peripheral Oxygen Saturation
T0	Baseline Time Point (Pre-stimulation)
T90	Post-stimulation Time Point (90 min)
TCA	Tricarboxylic Acid (Cycle)
VIF	Variance Inflation Factor
V1	Visit 1
V3	Visit 3
β	Unstandardized Regression Coefficients
µL	Microlitre
η2	Eta Squared