Cancer. Cancer boys have unlimited energy since childhood, as if they would never get tired of doing anything. They can jump from morning till night, so active Cancer boys tend to consume themselves through fitness. More importantly, they can have fun in fitness and exercise well. Cancer boys still care about their appearance, but they don't show it in the outside world, because cancer can be said to be a little shy and not good at expressing their feelings in front of outsiders.
Pisces. Pisces boys don't know why, but they are born with a passion for fitness. There is no reason why they just like fitness. They can't accept their poor or even obese bodies in the mirror. They just think that without a good figure, they will be depressed. They like to have a perfect figure, so if they insist on fitness to have a very good figure, they will be happy.
Finally, figure is a personal effort acquired, not to say that any constellation must have a good figure. Constellation is so subjective that sometimes you can't believe it.