The article in online version (czech language only):
Chair on a Spring: We've Tested Balancing Chairs in All-Day PC Work
18 April 2019 - The editors of the popular computer e-magazine Živě.cz tested Adaptic and competing spring-mounted chairs. While the review debates the value of the healthy sitting concept, their test results do show that tilting-seat chairs are beneficial. The review includes videos as well.
Adaptic Therapeutic Chairs Win Independent Physical Therapist Test
18 March 2019 - A Slovak summary of the FYZIOklinika test of Adaptic and Spinalis therapeutic chairs published by Pravda.sk.