A studied showed that elderly asians have better health outcomes that their western counterparts in part due to their practice of sitting on the floor. The added exertion of standing up from the floor rather than a chair makes a material difference in their health.
At least in China they also have a lot of public parks where they all gather for group exercise with all the other elderly people.
Some of the health tests in Japan that elderly people take include a "standing to sitting on the floor and getting back up all unsupported" test. Scores are based on time, effort, emitted sounds (like grunts), hands-on-ground and whatnot. I don't know the specifics, but it is used as a "health measure."