The present invention relates to a vibration monitor (30) which is configured to be worn by an operator during use of a power tool. The vibration monitor comprises a vibration sensor (36) which is operative to sense vibration sustained by the operator when the vibration monitor (30) is worn by the operator. The vibration monitor (30) further comprises a processor (32) configured to receive sensed vibration data from the vibration sensor (36) and to transform received vibration data whereby the transformed data is more representative than the received vibration data of vibration at a location on a power tool or a workpiece with which the operator is in contact during use of the power tool.
