Chair attachment designed for Stanford Longevity Design Challenge 2018.

Team Leader  - Alden Jaakola 

Team - Jakob Mahla, Frankie Yu, Maura McDaniel


Contemporary research in ergonomics revealed that the immobile right angle chairs and the dimensions to which they are conventionally constructed are an immense detriment to the lifelong health of all who use them. With our idea we propose an additive solution that teaches and facilitates healthy physical development and positive habits early on.

Posture Research.jpg


The natural resting position of one’s body occurs when the legs releative to the spine is at an 135 angle, at this angle one’s spins is in it natural S curve. When sitting at this angle the lumbar curve is retained, the muscles are relaxed, and the body is well-balanced. 135 is the ideal sitting position and allows the spine to carry the weight of is a more natural and comfortable way.

What's unique about the Second Seat is the range of motion it provides all while correcting one's posture to the ideal 135 angle. 


Comparison between the Second Seat in various seating positions. (Left) Frankie Yu, demonstrating initial use in developing an attachment for school chairs. (Above) Thomas Oliphant, demonstrating alternative use of floor seating. The Second Seat allows him to be elevated enough to cross his legs, which he could not do without it.