Of course, it is healthy and will not affect breathing. Humans have been like this since ancient times, but nearly ten thousand years ago, humans gradually learned to grow plants and raise livestock. The progress of productive forces will also make mankind what it is now. Especially in Europe and America, after the agricultural mechanization was realized in the 1920s, the grain output increased greatly. There is much less heavy physical labor for human beings. So I gradually lost weight and gained weight. That's why we think it's exaggerated now. Even if he practices again, it's just a muscle, just a fiber made by protein. It won't do any harm to human body.
Schwarzenegger is absolutely healthy. It's hard to be like him. You need a top team, give all kinds of support and have a good plan. You have to be talented, not everyone can practice.