When I was a kid, one of my favorite comic book series, when I found old issues at various local bookstores, was Strange Sports Stories. When I saw this at a used bookstore, i had to pick it up.
A lad in a high gravity world can really throw a discus. A promoter see him, and recruits him and some others to go to the Space Olympics. The kid meets a girl from a water world and sparks fly.
Juvenile, but entertaining.