Abstract: The invention relates generally to devices, systems (100) and methods for measuring, transmitting, recording and displaying information relating to physical exercise. According to some aspects, the disclosure relates to a method comprising receiving exercise data associated with exercise performed at the exercise machine (1) and associating the received exercise data with a user being logged in at the exercise machine (1). The method further comprises receiving, from a holder (70) arranged at the exercise machine and configured to hold a user device during exercise, a signal indicating an identity of the exercise machine and an indication that an object is removed from the holder, and logging out the user from the exercise machine in response to receiving the signal.

Abstract: A monitoring arrangement for use with an exercise device. The monitoring arrangement includes an inertial measurement device that detects an exercise activity of the exercise device and an activity measurement device having an active mode and a disabled mode. The activity measurement device is operable to quantify the exercise activity of the exercise device when in the active mode, where the activity measurement device uses less power when in the disabled mode than in the active mode. A control unit is configured to detect, via the inertial measurement device, a start of the exercise activity, to cause the activity measurement device to operate in the active mode upon detecting the start of the exercise activity, and to operate the activity measurement device to generate measurement data that represents the exercise activity when in the active mode. The activity measurement device is defaulted to the disabled mode to save power.