Underwater vital signs monitoring of respiratory rate, blood pressure, and the heart's status is essential for healthcare and sports management. Real‐time electrocardiography (ECG) monitoring underwater can be one solution for this. However, the current electrodes used for ECGs are not suitable for aquatic applications since they may lose their adhesiveness to skin, stable conductivity, or/and structural stability when immersed into water. Here, the design and fabrication of water‐resistant electrodes to repurpose stretchable electrodes for applications in an aquatic environment are reported. The electrodes are composed of stretchable metal–polymer composite film as the substrate and dopamine‐containing polymer as a coating. The polymer is designed to possess underwater adhesiveness from the dopamine motif, water stability from the main scaffold, and ionic conductivity from the carboxyl groups for signal transmission. Stable underwater conductivity and firm adhesion to skin allow the electrodes to collect reliable ECG signals under various conditions in water. It is shown that wearable devices incorporated with the water‐resistant electrodes can acquire real‐time ECG signals during swimming, which can be used for revealing the heart condition. These water‐resistant electrodes realize underwater detection of ECG signals and can be used for health monitoring and sports management during aquatic activities.

中文翻译：

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用于水上耐心心电监护的防水保形混合电极。

水下生命体征监测呼吸频率，血压和心脏状况对于医疗保健和体育管理至关重要。水下水下实时心电图（ECG）监控可能是一种解决方案。但是，用于ECG的电流电极不适合用于水生应用，因为当浸入水中时，它们可能会失去对皮肤的粘合性，稳定的导电性和/或结构稳定性。在此，报道了将防水电极改用于水环境中的可伸缩电极的设计和制造。电极由可拉伸的金属-聚合物复合膜作为基材和含多巴胺的聚合物作为涂层组成。该聚合物被设计为具有来自多巴胺基序的水下粘合性，主支架的水稳定性和羧基的离子电导率用于信号传输。稳定的水下电导率和对皮肤的牢固附着力使电极可以在水中各种条件下收集可靠的ECG信号。结果表明，带有防水电极的可穿戴设备可以在游泳过程中获取实时ECG信号，可用于显示心脏状况。这些防水电极可实现水下ECG信号检测，可用于水上活动期间的健康监测和运动管理。结果表明，带有防水电极的可穿戴设备可以在游泳过程中获取实时ECG信号，可用于显示心脏状况。这些防水电极可实现水下ECG信号检测，可用于水上活动期间的健康监测和运动管理。结果表明，带有防水电极的可穿戴设备可以在游泳过程中获取实时ECG信号，可用于显示心脏状况。这些防水电极可实现水下ECG信号检测，可用于水上活动期间的健康监测和运动管理。