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.
Boys ages 4 to 8 require 1,200 to 2,000 calories, boys ages 9 to 13 need 1,600 to 2,600 and teen boys ages 14 to 18 need about 2,000 to 3,200 calories per day to maintain a healthy body weight. Protein is important for growth, strength and muscle maintenance in school-age children.