If you walk around or stand for a long time, your feet will lose slack play and feel like jelly. That is a signal of your limitations. Nowadays, however, people avoid reaching their limitations before it. Keep everything moderate. But we cannot understand what is moderate without knowing our limitations. Being moderate without knowing the limitation is just shrinking. You won't be robust without knowing your limitations.
"November 28 2019
from “Oriori no Kotoba” by Kiyokazu Washida, The Asahi Shimbun"