The sensors will go to sleep (stop measuring) if they are out of range of the receiver for 5 consecutive minutes. After the sensors go to sleep it is not possible to recover data as it was never measured. Every time the sensors get back into range they reset this 5 minuter timeout timer. As an example, they can go out of range for 4+ minutes and come back in for a few seconds to reset the timeout timer and then go out for 4+ minutes again. However, the myoMOTION and DTS Lossless functionality was not designed for data logging–it was designed to fill intermittent gaps due to poor wireless conditions. Data recovery can take a very long time for long periods of loss. For true data logging the myoMOTION Datalogger or the DTS Belt Receiver should be used.