BR	Breathing reserve
COPD	Chronic obstructive pulmonary disease
CPET	Cardiopulmonary exercise testing
DLCO	Diffusing capacity for carbon monoxide
EELV	End expiratory lung volume
EILV	End inspiratory lung volume
EVL	Expiratory ventilatory limitation
Ex-tFVL	Tidal flow-volume loops during exercise
FEV1	Forced expiratory volume in one second
FRC	Functional residual capacity
FVC	Forced vital capacity
GET	Gas exchange threshold
IC	Inspiratory capacity
IRV	Inspiratory reserve volume
HR	Heart rate
MaxFVL	Maximal flow-volume loop
MVV	Maximal voluntary ventilation
RER	Respiratory exchange ratio
RPE	Rating of perceived exertion
RV	Residual volume
SpO2	Oxygen saturation
VT	Tidal volume
$\dot{\mathrm{V}}$CO2	Carbon monoxide output
$\dot{\mathrm{V}}$E	Minute ventilation
$\dot{\mathrm{V}}$O2	Oxygen uptake