1. On one foot: Stand on one foot and bend other knee, lifting nonsupporting foot off floor without letting it touch standing leg. (Do this in a doorway so you can grab the sides if you start to fall.) Repeat with eyes closed. People age 60 and younger can typically hold the pose for about 29 seconds with their eyes open, 21 seconds with their eyes closed. People age 61 and older: 22 seconds with eyes open, 10 seconds with eyes closed.

2. On both feet: Stand with feet together, anklebones touching, and arms folded across chest; then close your eyes. Have someone time you: Though it's normal to sway a little, you should be able to stand for 60 seconds without moving your feet. Next, place one foot directly in front of the other and close your eyes. You should be able to stand for at least 38 seconds on both sides.

3. On ball of foot: Stand on one foot with hands on hips, and place nonsupporting foot against inside knee of standing leg. Raise heel off floor and hold the pose—you should be able to do so for 25 seconds.