Here we aimed to demonstrate that swinging can modulate physiological parameters of human sleep. To this end, we chose to study sleep during an afternoon nap using polysomnography and EEG spectral analyses. We show that lying on a slowly rocking bed 0.25 Hz facilitates the transition from waking to sleep, and increases the duration of stage N2 sleep.

via Current Biology – Rocking synchronizes brain waves during a short nap.