>>324915614
How you do it is important for the test.
Start from a seated position with your legs forward; then tuck your legs back underneath you and use them to lift yourself upright in a smooth motion without the aid of your elbows or hands.

It tests flexibility, coordination, core and leg strength at once; if you can't do it you're probably in serious need of exercise, weight loss and conditioning [spoiler]like I unfortunately am.[/spoiler]