The show you’re referring to might be “The Beast Must Die,” although it is more widely recognized as a horror movie rather than a television series. The film was released in 1974 and involves a werewolf, but it doesn’t include a scene with a werewolf climbing a rope in a gym or hiding at a construction site. It’s possible that you’re thinking of a different show or you may have combined elements from various sources.
Another possibility could be the TV series “The Incredible Hulk,” which aired from 1978 to 1982. While it features a character with superhuman abilities who often hides and escapes authorities, it doesn’t specifically involve werewolves or the exact scenes you’re describing.
If these suggestions don’t align with what you recall, consider looking into more obscure or short-lived series from that era, or checking forums and databases dedicated to vintage television programs for further clues. Additionally, it’s worth exploring if the scene might be from a werewolf episode of a broader anthology series, such as “Night Gallery” or “Kolchak: The Night Stalker,” both of which aired during that period and occasionally featured supernatural content.