“…Recently, self-powered flexible biosensing devices have been used in real-time monitoring various physiological indicators like blood glucose, body temperature, heart rate and pulse in daily life [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. These self-powered flexible sensors that possess the ability to work without external power could also be probably used in the domain of sports motion monitoring [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].…”