“…They can provide efficient and precise psychophysiological and location values [ 13 ]. Some research works have started to measure frailty indicators [ 3 , 14 , 15 , 16 , 17 , 18 ], being the most used devices electronic stickers, bands, bracelets, smartphones and smartwatches [ 15 , 19 , 20 , 21 , 22 , 23 ]. However, these approaches only measure the physical dimension of the frailty during a BADL with only one sensor, either the accelerometer or the gyroscope.…”