This podcast episode explores the concept of nap duration and its impact on cognitive performance. The host discusses the benefits and downsides of napping, emphasizing the need to consider the cost-benefit ratio. The sections delve into various nap durations, ranging from five minutes to longer than 30 minutes, highlighting their effects on brain function and sleep inertia. The episode also explains the phenomenon of sleep inertia and its relationship with nap duration. Additionally, the origin and significance of the term "power nap" in aviation are discussed, particularly in mitigating sleep deprivation among pilots.