Peter Opsvik is a Norwegian furniture designer best known for his innovative and ergonomic chairs. Opsvik wrote a book called Rethinking Sitting (2009), offering his thoughts on sitting and an explanation of his philosophy behind his well-known chairs. Creating solutions to stereotypical sitting habits to implicitly inspire movement and variations in posture can be seen as a key factor in Opsvik's work. Opsvik still operates his namesake design studio in Oslo today. In addition to design, Opsvik is a Jazz musician and a longtime member of two Jazz bands.