在刚刚过去的"双十一"购物节，智能手表凭借不断升级的健康监测功能，成为智能穿戴领域的热门 单品。在不少电商平台的智能手表详情页上，压力测试功能成为主要卖点之一。 热度之下，质疑声随之而来。在一些社交平台上，"熬夜刷剧后手表竟显示'健康状态优秀'""海边度 假时手表提示压力过载"等吐槽屡见不鲜。那么，这些动辄数百上千元的智能手表能否准确监测压力？ 专业医疗机构采用的标准化压力测试与智能手表的日常监测有何区别？科技日报记者就此采访了相关专 家。 智能手表监测： 两把"尺子"综合"测量" 那么，目前更科学、准确的压力测试方式是什么呢？ 多因素致结果出现偏差 智能手表究竟是如何监测压力的？天津体育学院教育与心理学院副教授常淑芝介绍，当前多数消费 级智能手表的压力评估功能，核心依赖心率变异性（HRV）这一生理指标。HRV指人体连续心跳间期 的微小波动，其数值变化直接反映人体自主神经系统的调节功能。 "这一系统包含交感神经和副交感神经，前者像油门，主导兴奋状态以应对压力；后者像刹车，负 责放松与状态恢复。"天津市泰达医院心理科副主任医师李树华说，当人处于高压状态时，交感神经会 兴奋，HRV数值会降低；当人处于放松状态时， ...

Core Insights - A research team from Tufts University has developed an innovative sensor device that uses specially designed dental floss to measure cortisol levels in saliva in real-time and with precision [1] - The device aims to provide a more accurate and cost-effective alternative to existing stress monitoring tools, which often rely on subjective questionnaires and mental assessments [1] Group 1: Product Development - The saliva sensor dental floss resembles regular dental floss, featuring a plastic handle with two supporting strands and a sensing line that captures saliva through capillary action [1] - The detection area in the handle is equipped with electrodes that utilize "electropolymerized molecularly imprinted polymers (eMIP)" technology to accurately capture cortisol molecules [1] - The research team is advancing the product towards commercialization, emphasizing ease of use for households and individuals without the need for training [1] Group 2: Market Application - The device is designed to integrate stress monitoring into various aspects of healthcare, potentially improving the management of stress-related health issues [1] - Researchers note that while saliva biomarkers are suitable for long-term monitoring, blood tests remain the gold standard for initial disease diagnosis [2] - The dental floss sensor is particularly beneficial for long-term tracking of cardiovascular health and timely intervention after a diagnosis [2]