SARS-CoV-2	Severe Acute Respiratory Syndrome Coronavirus 2
MIS-C	Multisystem Inflammatory Syndrome in Children
PFTs	Pulmonary Function Tests
CPET	Cardiopulmonary Exercise Testing
VO2	Oxygen Consumption
VE	Minute Ventilation
OUES	Oxygen Uptake Efficiency Slope
BSA	Body Surface Area
BM	Body Mass
BRI	Breathing Reserve Index
MVV	Maximal Voluntary Ventilation
VCO2	Carbon Dioxide Output
VE/VCO2	Ventilatory Equivalent for Carbon Dioxide
AT	Anaerobic Threshold
Wpeak	Peak Work Rate
SaO2	Arterial Oxygen Saturation
ECG	Electrocardiogram
O2/HR	Oxygen Pulse
GLI	Global Lung Initiative
PAQ-C	Physical Activity Questionnaire for Children
PAQ-A	Physical Activity Questionnaire for Adolescents
FEV1	Forced Expiratory Volume in 1 Second
FVC	Forced Vital Capacity
DLCO	Diffusing Capacity for Carbon Monoxide
MBW	Multiple-Breath Washout
LCI	Lung Clearance Index
RV/TLC	Residual Volume to Total Lung Capacity Ratio
KCO	Transfer Coefficient of the Lung for Carbon Monoxide
BMI	Body Mass Index
RD	Respiratory Disease
LVEF	Left Ventricular Ejection Fraction
HR	Heart Rate
RER	Respiratory Exchange Ratio
Vt	Tidal Volume
VLI	Ventilatory Limitation Index