For an effective lower-body workout with a serious dose of conditioning, it’s hard to beat the classic sled.

More runners on the sidewalk, more cyclists on the street, more pick-up games on outdoor courts—the sure signs of spring are here, even if the COVID-19 crisis has us standing six feet apart from each other.

Boxing is likely one of the most well-known sports in the world. Some of the most famous athletes in the world were boxers, including the legendary Muhammad Ali—a name you’ll see on virtually every list of recognizable athletes.