“…The rapid advancement in materials, sensors, circuits, and wireless transmission technologies will give way to the body sensor network (bodyNET) ( Niu et al., 2019 ; Tian et al., 2019 ), which enables human physiological signal detection not only on the skin but also inside the body as shown in Figure 1 A ( Lee et al., 2019a ; Zheng et al., 2020 ). Flexible electronic technologies allow the sensors to exist in various forms, including electronic skins that are directly attached to the skin ( Chen et al., 2019a ; Oh and Bao, 2019 ; Pu et al., 2017b ), clothes that are worn on the human body ( Chen et al., 2020b ; Shi et al., 2020c ), glasses ( Vera Anaya et al., 2020 ), face masks ( Zhang et al., 2020a ), watches ( Quan et al., 2015 ), gloves ( Sundaram et al., 2019 ), insoles ( Wu et al., 2020b ), socks ( Zhang et al., 2020c ), shoes ( Li et al., 2017 ), and implantable devices ( Arab Hassani et al., 2020 ; Hinchet et al., 2019 ; Xiang et al., 2016 ), to provide comprehensive monitoring of the user's health status and motions. For instance, the sensors attached to the skin or worn on the body can record body temperature, pulse, respiration rate, blood pressure, etc.…”