EMG measure of motor output will be recorded during voluntary respiratory motor tasks attempted in the sitting and supine position. The protocol will consist of 5 minutes of quiet breathing followed by Maximum Inspiratory Pressure Task (MIPT), Maximum Expiratory Pressure Task (MEPT), and cough. During MIPT/MEPT, subjects will be asked to produce maximum inspiratory or expiratory efforts for 5 seconds. Each maneuver will be cued by an audible tone and repeated three times using a Motion Lab EMG System with pairs of pre-amplified electrodes (Motion Lab Systems, Baton Rouge, LA) centered over the muscle belly. Bilateral recorded muscles include: clavicular portion of pectoralis (PEC); 6th intercostals (IC6); rectus abdominus (RA); obliquus abdominus(OBL); paraspinal (PSP). The incoming sEMG signals will be filtered at 30-1000 Hz and sampled at 2000 Hz.