 Their "kuleana", or responsibility, is therefore to uphold the training and discipline of their haumāna through a perpetuation of their hālau traditions.The kumu is also responsible for the spiritual integrity of the hālau, and is responsible for instructing students in the proper care and protocol of the hālau, which includes their physical well-being by teaching good exercise, dietary, and hygienic practices.Within a hālau there are typically two classes of performers.The "ʻōlapa," or dancers, who, like the ʻōlapa tree (or cheirodendron trigynum) dance with agility and bend gracefully alikened to the motion of the leaves of the ʻōlapa.