Anti-fatigue mats are often used to decrease foot and lower limb disorders for workers who stand in one position for long periods.
Anti-fatigue mats absorb the shock due to walking and this cushioning effect reduces foot fatigue. In summary, the use of anti-fatigue mats or placing carpeting on the floor does not eliminate sore feet by itself, but, when combined with proper work design and quality footwear, it should improve working conditions.
The optimal thickness of the mat should be 3/4″ as it provides the best anti fatigue assets. However, if you already have some softer flooring at a place you wish to put your mat on, 1/2“ should be sufficient.