What does training for freediving entail?

There are generally three components to freediving training and include classroom, pool, and open water.  AIDA, the leading freediving training program has various levels of training.  Basic training in levels 1 and 2 are the entry levels, level 2 being for divers that have a background in diving.  Level 3 advances the basic training and level 4 is for those who wish to organize and lead freediving events. Beyond level 4 is a Master freediving course.  All courses are comprised of classroom instruction, yoga practice, breathing practice, and open water diving sessions.