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.
Everyone needs a different amount of calories depending on your gender, age, size and activity level. Gender: An average teenage boy needs around 2,100 to 2,400 calories per day. An average girl needs around 1,700 calories per day. Boys need more calories per day because they tend to have a higher level of testosterone which generally increases muscle mass.