[Cycl0ps]

Per the linked Wikipedia article, "experienced" practicioners can maintain the stance for ~40 minutes. While pop culture can make it appear like a traditional equivalent to sitting in a chair it's really not meant for prolonged use

[elric]

40 minutes? I can go hours. Squeezing your toes every once in a while and/or subtly shifting weight makes really long sittings more bearable. It's not as comfortable as sitting cross legged ("criss cross applesauce", according to some), but it's OK. It's my go-to position for many seated tasks, including typing this comment.