Well designed communities with active commuting would help, cycling to work or cycling to the trian station and then walking to work. No need for a car, save a fortune there. No nees to drive to a gym to walk on a treadmill.

Along with active communities that encourage people to go outside when they are home eg walkable areas to parks, walkable to events etc.

Maybe work but China is big on 996 exhausting work culture, not as obese