Dear Savvy Senior: Because of chronic arthritis, I have a very difficult time going up and down stairs anymore and am interested in purchasing a stair lift for my two-story house. Can you recommend ...

Stair lifts are available in straight, curved, outdoor, standing/perching and modular/reconditioned forms. Understanding these options will help you make smart decisions that balance safety, ...

This two-stair prototype harvests energy from a user as they descend the stairs, then returns it on the upward climb. Yun Seong Song et al (2017) Trying to update stairs is like reinventing the wheel: ...