Within the safety limitations all exercises should be as effective as possible. This has been always the primary goal in our equipment design. To achieve this David has participated and initiated research on various areas for a quarter of a century. The core of the know-how lies in biomechanical and physiological studies from the 80’s continuing in current studies in Finland, Germany and Austria. For us it is not enough that we think we have the right technology or concept, we also want to prove it. It is a long road, but eventually it pays off as the example with NICE guidelines in the UK shows. It took 17 years from the publication of a study with David back devices before it was used as in the guidelines of how to treat chronic and recurrent back pain.