I deeply disagree. Taking the whole population is the only sensible interpretation. Answering like "duh, you actually go to the gym, of course you're better than 95% of guys on Earth, that's so unimpressive, anyone could do it if they did it." entirely misses the point. The point is precisely that you actually did it, while 95% did NOT do it and now you are ahead of 95% of people in this thing.
If you always had to be 95th percentile in your current peer group (general couch potatoes, high school championship participants, world championship participants, Olympians, Olympic medalists, Olympic champions, Olympic champions twice in a row), then the 95 just doesn't mean anything. Then you just have to be the single very best according to your logic.
The point is not about "impressive" or not. It's about 95th percentile or not.