11.   He eventually got so weak, he stopped taking stairs at work.

12.   I take stairs even when elevators await.

13.   I took the stairs two at a time.

14.   I took the stairs down and rejoined Masako.

15.   I took the stairs two at a time, and without making a sound, I lay on my belly and pushed the contraband far out of sight.

16.   It has surveillance cameras, and anyone who wants to take the stairs up to the crown must pass through airport-style X-ray and screening equipment.

17.   Look for opportunities to increase your level of fitness, like taking the stairs instead of the elevator, or parking farther away than you normally would.

18.   People should take the stairs more often and try to do more walking.

19.   Seemingly minor changes like taking the stairs and walking to the parking lot can make a big difference.

20.   She took the stairs instead and there was a long line of people behind her.