“…Other studies used wearable sensors to monitor sleep-wake activity (time spent asleep and motor activity during sleep) [ 45 ], as well as sleep measurements (total sleep time, sleep latency, sleep efficiency, and wake after sleep onset) [ 39 ], or circadian rhythm [ 40 , 41 ]. Several studies have investigated balance [ 38 ] and walking/gait characteristics [ 25 , 26 , 28 , 30 , 32 , 33 , 37 , 38 , 42 , 44 , 48 , 52 ]. Kegelmeyer et al made a quantitative biomechanical assessment of trunk control, measuring the trunk stability during standing, sitting and walking, and the ability of individuals to modify trunk position responding to some auditory cues [ 50 ].…”