The types of girls that fitness boys like can vary from person to person, but generally speaking, they prefer girls who are healthy, active, sunny, confident, passionate about sports and extroverted. Here are some features that may appeal to them:

1. Health: Fitness boys are usually very concerned about health, so they are more inclined to choose healthy, energetic and disease-free girls.

2. Exercise: Fitness boys usually like sports, so they may prefer girls who also love sports and have fitness habits.

3. Figure: Fitness boys usually have higher requirements for figure, so they may prefer girls with symmetrical figure, beautiful lines and tight muscles.

4. Self-confidence: Fitness boys usually have stronger self-confidence and self-esteem, so they may prefer girls who are equally confident, optimistic and positive.

5. Hobbies: Fitness boys usually have a strong interest in sports and fitness, so they may prefer girls who have the same hobbies and can exercise and fitness together.

It should be noted that these are just some characteristics that may attract fitness boys, and do not mean that all fitness boys will pursue these characteristics. In addition, girls' own temperament, personality and values will also have an impact on whether they can attract fitness boys.