Here are four common sleep myths, refuted by scientific studies. A paper breaking down common sleep myths published in Sleep Health, the journal of the National Sleep Foundation—written by Rebecca Robbins of NYU Langone Health and several other collaborators—states definitively that there’s no data backing up the idea that you need a buffer between working out and sleeping. The logic is that dreaming occurs during REM sleep, and recalling your dream means your REM sleep was disrupted. Others say that remembering dreams means you did sleep well, intuiting that having dreams at all means you had a lot of REM sleep. The problem: you may be recalling dreams because you had plenty of REM sleep, or because your REM sleep was interrupted.