Which of the following is TRUE concerning the effects of exercise on the menstrual cycle?
A. Amenorrhea is more common in female athletes than in the general population of women.
B. Both physiological and psychological factors may cause menstrual abnormalities.
C. The female athlete triad involves an eating disorder, amenorrhea, and osteoporosis.
D. Exercise may decrease women's lifetime exposure to estrogen and decrease the risk of breast and reproductive cancer.
E. All of the statements are true.
E. All of the statements are true.
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Which of the following is an advantage of using strength-training machines?
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