US company Altwork is set to release an office chair design that lets users sit, stand or lie down while using their computers.

Altwork says the concept is aimed at “high-intensity computer users” which it defines as people who spend at least four hours a day in front of a computer.

The company says: “Nothing has changed [in office furniture] in the last century. Even with the advent of lightweight laptops we’re still bending to our machines and working on tables and chairs like we did in 1899 – never mind 1999.”

It adds: “While there is no formal ergonomic data… many experts believe a large part of the health benefits from standing come from keeping the torso and legs at greater than 135 degrees apart to allow blood flow vs. the 90 degrees that a traditional chairs require.”

The Alternet chair design can be adapted to allow the user to work in any position they want. It is built around four key positions: sit, stand, collaborate and focus.

The chair can hold computer equipment weighing up to 15kg, which Altwork says should accommodate two computer screens.