Halakhah for Berakhot 86:20

"A person is forbidden to walk four Amot standing upright, as it is written: 'The whole land is filled with [God's] glory'" (Kidushin 31a). "And anyone that walks standing upright — it is as if he is pushing the legs of the Omnipresence" (Brachot 43b). And the Gemara's intention is not that one should walk hunched over, but rather that one shouldn't walk too straight with his neck outstretched like people with too much pride. And these are the words of the Rambam in the fifth chapter from Hilchot Da'ot, Law 8: "A Talmid Chacham should not walk straight and with an outstrectched neck, like it is written, 'And they went with their throats outstretched.' Also, one should not walk with his heel to his big toe, like women and haughty people, as it is written: 'The women would go with their feet close together'. And one shouldn't run in public areas like the crazies, and shouldn't stoop over like people who suffer from a hunched back, but rather look down, like one who is standing in prayer. And one who is walking in the market should look like he is busy with his business. Also from the stride of a person can it be recognized whether he is wise and full of knowledge or if he is dim-witted. And so said Shlomo in his wisdom: "And also in the way that a fool walks his heart is empty, and he is telling everyone that he is a fool.'"