You seem to have a very narrow range of experience there. The people in your world must be limited to those with round eyes and western diet.
Hey, Don't make mistake, I am Chinese, not westerner. I know what Chinese women look like because I was raised by them,and married to them. Generally Chinese woman looks younger than westerners, I know that, but the Gym team is surely beyond that far.
It is hard for women to hind their ages, their faces, skins and manners would tell the secret. So if someone states some women could be recognised 12 when she is 30, according to my experience I say she could not be Chinese. She may be aliens or something else, but not Chinese.
Faking ages by China's olympics athletes is an open secret in China for years, so I dont need to google Bella Caroli to know which side should I trust.