I'm a little confused. Seems like I started stuff like under arm hair really young but I haven't changed like I should have. Is it possible to get 'stuck'? I'm an athlete but have to watch everything I eat or I'll gain weight. Fat not muscle. Waiting to see a specialist now.
I'm curious what the specialist concludes. It is known that extreme athletes, such as those training for the Olympics can experience delayed or retarded development. This seems to be more true of women than men. See: Intensive Training and Sports Specialization in Young Athletes. Studies show no impact on sexual development in males.
Assuming that you are athletic but not aiming for the extreme, if there is a problem, the source is likely some place else. The various secondary characteristics are semi-independent. It is possible for some characteristics to race ahead of others. But notable difference should be checked out.