Listing a study does not mean it has been evaluated by the U.S. Federal Government. The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. For chair sitting, the height of the chair was adjusted to allow each participant's hips and knees to flex approximately to 90° and for their feet to rest comfortably on the floor. There is a reason monks meditate on the floor …

If the previously mentioned physically beneficial reasons aren’t enough to get you to slide off your chair and onto the floor, consider this: sitting on the floor can give you a brand new, humble and grateful perspective on others, the world and yourself. A Postural Study Comparing Sitting on the Floor Versus Sitting in a Chair While Playing Video Games.
Initially, people used to sit on the floor and eat. However, people feel that it is just an old-school tradition without much relevance.
Improved Posture Sitting for prolonged periods affects your low back angle and pelvis movement. Sitting on a table and chair and eating with a fork and knife have never been a part of Indian tradition. Here are four ways sitting on the floor is better for you than sitting on a chair. For floor-sitting, each person was asked to sit crossed-legged on the floor in a comfortable position.