Long Hair in Sparta

According to Aristotle in Rhetoric, Book 1, Chapter 9,

So are the distinctive qualities of a particular people, and the symbols of what it specially admires, like long hair in Sparta, where this is a mark of a free man, as it is not easy to perform any menial task when one's hair is long.

This is completely unrelated, but I wonder what cultural implications there are between the long hair of the Spartans, the long hair of the 60s, and the long hair of the self-indulgent glam-metal metals of the 80s.