Final answer:
For an 11-year-old male, a good performance on curl-ups typically ranges between 15 to 30 repetitions to indicate healthy muscular endurance, though individual abilities vary.
Step-by-step explanation:
The health-related fitness component being assessed by curl-ups in children is muscular endurance, particularly of the abdominal muscles. Curl-ups, also known as sit-ups, are an exercise where an individual lies on their back and lifts their torso towards their thighs and then lowers the torso back down. For an 11-year-old male, a healthy range of repetitions for curl-ups might be based on normative data that considers the average performance of peers. While standards can vary, one guideline suggests that a good performance for this age group might fall between 15 to 30 repetitions in a physical education setting. However, it's important to note that individual abilities can differ widely, and each child should focus on personal improvement over time rather than just a specific number of repetitions.