Sci-Fi Endurance vs Real-World Stamina

I’ve always been fascinated by how sci-fi portrays long-haul space travel characters pushing through isolation, fatigue, and months in cramped quarters. It makes me wonder how that stacks up against the mental and physical resilience we build here on Earth through training, sports, or just daily discipline. Has anyone found that their real-life endurance practices whether running, meditation, or something else feel comparable to those fictional scenarios? I’d love to hear your thoughts on what translates and what might just be creative license.