Walk by a park on a beautiful day, and you'll see tons of joggers decked out in neon. But as this funny video by Vox explains, it wasn't always cool to bond with your coworkers over calf soreness and your new kicks. Back in the day, running was acceptable for athletes but not something normal people did for exercise. One man was even ticketed for "illegal use of a highway by a pedestrian." You'll especially crack up over this 1968 newspaper article featuring the strange new trend.