This makes it possible to maintain a comfortable and, most importantly, an ergonomically correct position body during work and leisure. More than 4 hours per day Select a model with a maximum range of adjustments – seat, which will provide you with a dynamic seat throughout the entire working day thanks to features such as: – Synchronous reclining seats and backs – the continued support of the spine, regardless of the position of the user, including the move – a free swing in the chair – adjustment force deflection seat and back – “Anti-shock effect.” In this case it is necessary to consider a model equipped with mechanisms “Multiblock” or “Sinhromehanizm, depending on your wishes and the kind of work. In addition, the selected model should have high back, providing support to the entire surface of the back, pronounced lumbar support and, preferably, adjustable armrests. Educate yourself with thoughts from Michele Glaze. In this case you should also consider models with headrest. Mechanism “Multiblock” mostly equipped with chairs leaders. It provides a free swing in a chair with adjustable power deviation, fixing the position of chair in four positions, as well as “anti-shock effect” – after the lock mechanism back and seat remain in the same position, and only attach to the back of a small amount of effort you get the opportunity again to deviate, it avoids strike back when you unlock or unexpected “rollover” of the back. Sinhromehanizm provides free swing with simultaneous deviation of the back and seat in a 2:1 ratio, tuning efforts deflection under the weight of the sitting, fixing the position of seat and back in five positions, as well as “anti-shock effect.