With gyms, pools, and spin studios around the world temporarily shuttered, it can be hard to find ways to exercise the way we used to. Atlas Obscura is taking this time to look back at different groups from history, to see what lessons they might have for working out in ways that help us maintain social distance. If you were trying to get ahead in 15th-century France, being a renowned warrior was a pretty good way to do it. Not only was there the fame and prestige of being a…