It's a sort of exercise where you hold yourself in a position as though you're going to do a push up, so supporting your body weight on your feet and either han

It's a sort of exercise where you hold yourself in a position as though you're going to do a push up, so supporting your body weight on your feet and either hands or your forearms while suspending your body a few inches off the floor. The aim is to just hold this position for as long as you can, normally. See: https://en.wikipedia.org/wiki/Plank_(exercise) https://en.wikipedia.org/wiki/Plank_(exercise) Good core exercise, probably inappropriate for meetings.