Instrumentation
LUNG

PHILIPS Respironics Threshold IMT Lung Adjustable Constant Pressure Muscle Trainer (Threshold IMT, Philips Respironics, Inc., Murrysville, PA, USA)PORTEX Coach 2 incentive spirometer (Smiths Medical)Computerized Pulmonary Function Test Machine (RMS Helios 401, India)Portable MicroRPM (Respiratory Pressure Meter) (ICC 0.86–0.90)