A folk health proverb of disputed origin (often loosely attributed to traditional Chinese medicine and to the Ming-Qing physician Cao Tingdong
曹庭栋). Modern medicine has partly vindicated it: light walking after meals modestly improves blood sugar regulation. The number
九十九 jiǔshíjiǔ rhymes with
走 zǒu, which is why this version stuck rather than other round numbers.
