When 16-year-old "Whitney" made the varsity track team, she noticed that her best times were slower than the older girls, who were extremely thin. So Whitney began eating less. Within two months, she had dropped 11 pounds and reduced her body fat to less than 14%. Although her race times and endurance improved, Whitney's menstrual periods stopped.
Then, in her senior year, Whitney was predicted to qualify for the state track team. While running the day before the meet, she tripped on a tiny rock, fracturing her ankle. Though Whitney was lean, muscular, and appeared to be the picture of health, her doctor became concerned about her excessive dieting, low body weight, and loss of her period. These are all key risk factors for low bone density (osteoporosis) and fractures. He immediately ordered a bone density test, which tests the strength of bones. The test results showed that Whitney had low bone density and that she had the bone strength of a much older woman.
Puberty isn't easy -- especially when you go through it before any of your friends.
"It's a huge amount of change in a very short period of time," says Pamela Murray, MD, MPH. "Change is always tough." Murray is a pediatrics professor at West Virginia University.
Your body is going to go through a lot in just one to two years:
Growth spurt: Before you start your period, you can grow up to 4 inches in just one year.
New curves: You'll gain weight, especially in your hips,...
The female athlete triad is made up of three medical conditions that are becoming increasingly common in active teen girls:
Energy imbalance with or without an eating disorder
Decreased bone mineral density with or without osteoporosis
Low-calorie diets are usually the first sign of eating disorders. Excessive exercise or exercise obsession can be another sign.
Teens that are thin and exercise excessively are at higher risk of amenorrhea, the absence of a period. And amenorrhea is linked to decreased estrogen levels, which may be the cause of osteoporosis. A diet low in calcium and vitamin D can also contribute to low bone density.
Your doctor should evaluate and treat each of these three problems to ensure a healthy outcome.
Who's at Risk for the Female Athlete Triad?
Teen girls who restrict their eating and have amenorrhea are at highest risk for female athlete triad. Female athletes who try to reach a low body weight for running or dancing are more likely to have amenorrhea, as are those who compete in scoring sports such as gymnastics and figure skating.