fig4

Figure 4. MEFs have extensive applications in body monitoring and HMI: (A) Schematic diagram of the smart tennis training system. Reprinted with permission from^[62]. Copyright 2024, Wiley; (B) The all-textile pressure sensors could monitor pulse and respiratory signals in real time. Reprinted with permission from^[64]. Adhering to CC BY-NC 4.0 agreement; (C) The layer-by-layer structure and the flexibility of A­Textile (Scale bar: 2 cm). Reprinted with permission from^[69]. Adhering to CC BY-NC 4.0 agreement; (D) The exploded view and the broad applications of the UTE-skin. Reprinted with permission from^[74]. Adhering to CC BY 4.0 agreement. MEFs: Mechano-electric fibers; HMI: human–machine interaction; UTE: untethered triboelectric electronic; PDMS: polydimethylsiloxane; PVDF: poly(vinylidene fluoride); E-PT: elastic piezoelectric-triboelectric; NFs-SR: nanoflower–silicone rubber; NFs-GT: nanoflower–decorated graphite-like carbonized textile.