It's not chauvinistic, it's true.
Men tend to be more athletic as a whole than women. It's no different than saying that men as a whole tend to be taller than women. It doesn't mean that every man is taller and/or more athletic than every woman, but as a whole, this is the trend.
I know, there's no denying that men are stronger and more macho than girls. I would not want to have it any other way.
Please feel free to post photo's of fit men or Jeeps demonstrating their bigness and strength. :P