Young dancers are training at a very vulnerable time in their lives... So train the whole person, not just the dancer.
Deborah BullPeople often argue about this. Obviously one of the skills in performance is acting, and you can't expect every Romeo to really be in love with their Juliet!
Deborah BullYou increase muscle bulk by training against resistance. For example, weights. And in ballet, this isn't the case.
Deborah Bull