Final answer:
The occurrence of irregular menses in female athletes is generally highest in cyclists due to factors such as hormonal imbalances, low body weight, and high physical exertion.
Step-by-step explanation:
Irregular Menses in Female Athletes
The occurrence of irregular menses in female athletes tends to be highest in a. cyclists. This is because intense cycling can lead to hormonal imbalances, which can disrupt the regularity of menstrual cycles. Other factors such as low body weight and high levels of physical exertion can also contribute to irregular menses in female athletes.