No, we'll let you catch your breath first. The handsets will recognise the end of your swim by one or both hands exiting the water for 2 seconds or more, then you can double press one button to stop the recording. To keep your data clean and ensure it doesn't get corrupted by any sculling movements or other non-swimming hand actions you might take between laps, we recommend you stop and start your recording or keep both hands out of the water during rest periods.