Provided is a sensor-based muscle exercise assistive teaching device which comprises: a housing (10) mounted to a barbell; and a sensor module (20) including a sensor part (100) and an output part (600). The sensor part (100) is disposed in the housing (10) and includes a three-dimensional gyro sensor (110) and a three-dimensional acceleration sensor (120). The output part (600) includes an output communication part (610) which applies a sensing control signal to the sensor part (100) and receives a sensing signal from the sensor part (100) so as to output a rotational state of the housing (10).;COPYRIGHT KIPO 2018
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