A vibration dose measurement apparatus 10 for an operator's hand 1 comprises a sensing assembly 20 connected to a control unit 25. The sensing assembly 20 comprises an accelerometer 21, gyroscope 22, and gripping force sensor 23 and may be packaged within a protective housing (not shown). By monitoring output of the sensor assembly 20, the vibration dose experienced by the hand 1 can be estimated. In the present invention, the provision of gripping force sensor 23 allows for vibration dose measurement to be adjusted based on the output of gripping force sensor 23. This can therefore take into account the force applied by an operator in gripping machinery, which can impact significantly on the effective vibration dose.