fig7

Figure 7. Real-time human-motion and physiological-signal monitoring using the 4-PG/P@CoFe hydrogel sensor. (A)Frowning; (B) Cheek puffing; (C) Throat vocalization; (D) Finger bending at different angles; (E) Wrist bending at different angles; (F) Elbow flexion at different angles; (G) Knee bending at different angles. All photos in the figure were taken by the author during the experiment. PG: Polyacrylamide/glycerol.