Are you a leg-bouncer too? If so…

Dynaseat ingeniously harnesses untapped energy from the all-too-common subconscious leg bounce to generate and store electricity


Our ‘deep-seated’ society and culture contribute to heart complications, the leading cause of death globally.


Instead of trying to change one’s sedentary lifestyle, the aim is to invite healthy movement in a sitting experience to aid in the prevention of heart-related health problems. Dynaseat encourages the users to leg-bounce: a subconscous habit that protects blood vessels in legs and protects against arterial diseases, improves concentration and reduces stress. Since the leg-bounce is subconscious, Dynaseat is designed to harness the habit’s ‘free’ kinetic energy. I began by investigating various existing technologies such as hand-crank generators  including dynamos, alternators, and hand-pressure fans (below). They all have one thing in common: they transform mechanical stress into an electric charge.

The works-like prototype below is a combination of the technologies working in cohesion. The hand-crank mechanism from the torch and the dynamo and circuitry from the lantern were essential to Dynaseat’s development during lockdown.


Dynaseat encourages the subconscious leg-bounce or fidget habits by harnessing their kinetic energy to generate electricity. If the sitter remains active, they will generate electricity which is stored in a built-in battery, and can then later be used to charge a phone, power a light, or if implemented on a grander scale such as a restaurant or office, it could power much more. The generator is also servicable by the consumer just in case any of the components become dysfunctional.

The chair’s tubular steel frame serves as a convenient housing to route wires from the foot-rest, up to the armrest where the USB ports are located. The frame which serves as the chair’s supporting base also provides simple and clever circuitry integration.

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