Why won’t my legs grow?

One common complaint of many training is poor when compared to the upper body, or totally underdeveloped legs.

Which begs the question; Why won’t your legs grow as your upper body does?

To answer this in some detail we must take into account several contributing factors, you may be a victim of some, all or in some cases none of these but it will hopefully give you a better idea of how to get a better response and thus build a more balanced physique.