Firstly, take the stairs – always! When going down a flight, stop at the bottom and try this quick and easy leg workout
1. Face away from the stairs, with your left toes on the lowest step. Both feet should face forward. 2. Take a big step forward with your right foot and bend both knees deeply. Make sure your right knee doesn’t bend further forward than your right foot. 3. Use your right bum muscle to push yourself to a standing position. 4. As you stand, lift your left foot off the step and balance on your right leg for five seconds. Repeat five to 10 times, then switch sides.
(The Globe and Mail)