A wearable therapeutic device configured to be worn by a subject, comprising: a garment; an ECG sensing electrode included in the garment to sense electrocardiograph information of the subject; a therapy electrode included in the garment; a defibrillator coupled to the therapy electrode to apply treatment to the subject; at least one of an inductive element and a capacitive element included in at least part of the garment; and a controller configured: - to determine whether an amount of stretch of the garment is within a tolerance range based on at least one of the inductance of the inductive element and the capacitance of the capacitive element, - to determine whether the ECG sensing electrode and the therapy electrode are properly positioned based on the determination that the amount of stretch of the garment is within the tolerance range, - to determine a confidence level of the electrocardiograph information received from the sensing electrode, wherein the confidence level of the electrocardiograph information received from the sensing electrode is based on at least one of the inductance of the inductive element and the capacitance of the capacitive element; - to adapt the tolerance range for the amount of stretch of the garment based on the quality of the sensed electrocardiograph information; and - based on the determinations made, to direct the defibrillator to apply or to withhold treatment to the subject or to provide a notification to the subject via an interface regarding adjustments to the device. a garment; an ECG sensing electrode included in the garment to sense electrocardiograph information of the subject; a therapy electrode included in the garment; a defibrillator coupled to the therapy electrode to apply treatment to the subject; at least one of an inductive element and a capacitive element included in at least part of the garment; and a controller configured: - to determine whether an amount of stretch of the garment is within a tolerance range based on at least one of the inductance of the inductive element and the capacitance of the capacitive element, - to determine whether the ECG sensing electrode and the therapy electrode are properly positioned based on the determination that the amount of stretch of the garment is within the tolerance range, - to determine a confidence level of the electrocardiograph information received from the sensing electrode, wherein the confidence level of the electrocardiograph information received from the sensing electrode is based on at least one of the inductance of the inductive element and the capacitance of the capacitive element; - to adapt the tolerance range for the amount of stretch of the garment based on the quality of the sensed electrocardiograph information; and - based on the determinations made, to direct the defibrillator to apply or to withhold treatment to the subject or to provide a notification to the subject via an interface regarding adjustments to the device. - to determine whether an amount of stretch of the garment is within a tolerance range based on at least one of the inductance of the inductive element and the capacitance of the capacitive element, - to determine whether the ECG sensing electrode and the therapy electrode are properly positioned based on the determination that the amount of stretch of the garment is within the tolerance range, - to determine a confidence level of the electrocardiograph information received from the sensing electrode, wherein the confidence level of the electrocardiograph information received from the sensing electrode is based on at least one of the inductance of the inductive element and the capacitance of the capacitive element; - to adapt the tolerance range for the amount of stretch of the garment based on the quality of the sensed electrocardiograph information; and - based on the determinations made, to direct the defibrillator to apply or to withhold treatment to the subject or to provide a notification to the subject via an interface regarding adjustments to the device.