A Study on EMG Activation Changes of Spinal Stability Muscles during Forced Respiratory Maneuvers

Methods: Forty healthy subjects (19male, 21female, 20.8±1.9years old) performed quiet breathing and four different forced respiratory maneuvers (FRM) (Pulsed Lip Breathing, Diaphragmatic Breathing, Combination breathing, and respiratory muscle endurance training breathing) while in sitting and standing positions. EMG data for four muscles (TrA/IO, EO, RA, and ES) were collected and filtered using a band pass filter (20~200Hz) and a notch filter (60, 120, 180Hz).