An apparatus comprising a communication interface for receiving reference activity data items, current activity data, and current environmental data；at least one processor； and at least one memory including computer program code； wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to maintain a reference activity data item relating to a previous activity, which reference activity data item comprising reference activity data associated with reference environmental data； receive current activity data and current environmental data relating to a current activity；determine the reference activity data associated with the reference environmental data corresponding to the current environmental data； compare the current activity data with the reference activity data； and provide feedback for a user of the apparatus in response to the comparison.
