“…In recent years, there have been some attempts to combine several different kinds of instruments (sensors and electronic devices) when exploring the effects of prolonged sitting on individuals. The devices used in these studies included electrocardiogram (ECG) [ 14 ], EMG (electrocardiogram) [ 63 , 65 , 86 ], IMU (Inertial Measurement Unit consisting of accelerometers, gyroscope and compass) [ 57 , 82 , 87 , 88 ], motion capture systems such as Vicon (Vicon Motion Systems Ltd., Oxford, UK) [ 87 , 89 ] and Optotrak (Northern Digital Inc, Ontario, Canada) [ 62 , 71 ] as well as infrared cameras [ 10 , 29 ].…”