the stupidist thing known to man created by gym teachers (stupidest people known to man, other than the town dunce that is...) to tortue and embarass thier students.
NO, NO, PLEASE GOD, NO!
You're lucky if you haven't done this, and I'm assuming you haven't considering you've looked it up on here. It's a test in which people (usually students doing this for P.E.) running back and forth between two points 20m apart. Each run must be synchronized with a pre-recorded audio track which plays beeps (hence the name 'beep test') at regular intervals.