If you've watched any of the Rio games this past week, then you might have noticed that a common thread has emerged among the male athletes: hair. These guys aren't just shearing their locks and going for gold, they're putting some serious effort into their do's. And in many cases, that means some version of the undercut.
Thank (or blame) David Beckham for this, but it seems like every male athlete on earth since 2014 has gone in for the trendy hairstyle. But it wasn't always this way. Just as records are continually broken at the Summer Games, so too do hairstyles change. From feathered bangs to emo mop-tops, here's a look back at the last half-century of Olympic hair.