Answer: Excellent.
Explanation:To determine Haidy's fitness category, we need to compare her VO2max score to the average scores for her age and gender.
The American Council on Exercise provides the following VO2max norms for adults aged 30-39 years:
Poor: < 33.0 mL/kg/min
Fair: 33.0-41.9 mL/kg/min
Good: 42.0-49.9 mL/kg/min
Excellent: 50.0-57.9 mL/kg/min
Superior: > 58.0 mL/kg/min
Haidy's VO2max score of 52 mL/kg/min falls within the "Excellent" category, which means that her cardiovascular fitness is better than most people her age and gender.
Therefore, the correct fitness category for Haidy is "Excellent."