Inclusion Criteria:  I. Healthy Cohort:  Adults over the age of 18 and who are willing and able to give informed consent. Willing to participate in all activities related to this study, including trimming chest hair and wearing a reference device and the CPM wearable device. Volunteers of any race, any gender Range of physiques Healthy  II. Pathologic Cohort  Adults over the age of 21 and who are willing and able to give informed consent Willing to participate in all activities related to this study, including wearing a capnography device, thoracic impedance reference device, and the CPM wearable device.  Those who:  Are taking diuretic medications Are living with heart failure Have chronic obstructive pulmonary disorder (COPD) Are recovering from a coronary-artery disease-related event. Volunteers of any race, any gender-Range of physiques.  Exclusion Criteria:  I. Healthy Cohort  Injury or skin disturbance in the area of the test device Pregnant Currently smokes cigarettes  Has known respiratory conditions such as:  Flu Pneumonia/bronchitis Shortness of breath/respiratory distress Respiratory or lung surgery Emphysema, COPD, lung disease Has self-reported heart or cardiovascular conditions such as chest pain, AFib, CHF, cardiomyopathy, or other conditions that could interfere with cardiopulmonary function Has other self-reported health conditions that could interfere with the breathing patterns and exercises detailed in the protocol (including wearing a capnography mask)  II. Pathologic Cohort:  Under the age of 21 Cognitive or physical impairment sufficient enough to interfere with informed consent or successful completion of the protocol. Injury or skin disturbance in the area of the test device. Pregnant. Have life-threatening arrhythmias which require hospital admission and constant monitoring. Has other self-reported health conditions that could interfere with wearing a capnography mask.