However, in a redshirt year, student athletes may attend classes at the college or university, practice with an athletic team, and dress for play but may not compete in games. Using this mechanism, a student athlete has up to five academic years to use the four years of eligibility, thus becoming a fifth-year senior.
According to the Dietary Guidelines for Americans 2010, sedentary teen girls ages 13 to 18 need about 1,600 to 1,800 calories a day, while sedentary teen boys within the same age range require about 2,000 to 2,400 calories daily to maintain healthy body weights.
Consuming the right type of calories will help a teen girl meet her daily nutrient requirements. For example, the Institute of Medicine encourages teens to consume 45 to 65 percent of their calories from carbohydrates, 10 to 30 percent from protein and 25 to 35 percent of their daily calories from fats.