If you learn classical methods of drawing techniques you often do poses in different time frames - 1 minutes, then 2 minute, then 5 and 15 minute poses.

The shorter poses don't let you put in any detail but you learn how to quickly express gesture and delineate important masses and shadow.

For 5 minutes poses you're essentially practicing the first 5 minutes of a drawing intentionally without intending to finish it.

It's essentially a similar idea.