Well, in adventure stories, there are often guys who are sucking in the sense of being in difficult situations. For example, in a survival story in the jungle, a guy might be sucking at finding food and water at first, but then he learns and adapts. Another case could be in a sports story, where a guy is sucking at a new sport he's trying, like skateboarding. He keeps falling but eventually gets better with practice.
It can mean that the guys in the stories are not performing well in certain aspects. For instance, in a detective story, a young detective might be sucking at solving the mystery at the beginning. He misses important clues and makes wrong assumptions. But as the story progresses, he sharpens his skills and finally cracks the case.
There is no evidence to suggest that such activities occur in a gym environment. Gyms have rules and ethics in place to maintain a proper and respectful atmosphere for all members. This kind of description violates the basic norms of a public fitness place.
Most literature aims to promote positive social values, and topics like this are not part of the acceptable content in literary works. We should look for stories that are about love, friendship, and moral growth in literature.
I'm not aware of any such stories in mainstream popular culture. Truckers are usually associated with their driving jobs, long hauls, and the trucking industry in general, not such inappropriate or vulgar content.