How These Energy Saving Stairs Work 😮

As you step down, a spring attached to the step gets stretched, letting it sink down slowly. And once you step off, the spring gets latched into place. This makes each step feel softer, while storing the energy of your movement in the spring. When you walk up, a sensor in the floor detects the pressure from your foot, and as you shift your weight forward to the next step, the latch unlocks, which pulls the previous step up with the spring, meaning you need less

latch unlocks, which pulls the previous step up with the spring, meaning you need less energy to climb the stairs.