You can almost certainly improve how you sit down. A lot of people just sort of flop down and sit with their hips slid forward and a pronounced bend in their ba

You can almost certainly improve how you sit down. A lot of people just sort of flop down and sit with their hips slid forward and a pronounced bend in their back. Anecdotally I have also noticed many of the same people complaining about a lack of legroom in trains, airplanes, cars and so on. If they would simply sit down by pushing their butt and lower back into the chair instead of lazily flopping down, there would be plenty of space. (Not directed at those people with long legs, who do have genuine legroom issues even when sitting up straight)