Constant Weight without fins

From Wikipedia, the free encyclopedia

Constant Weight Without Fins is AIDA free-diving discipline in which the free-diver descends and ascends swimming without the use of fins or without pulling on the rope or changing his ballast; only a single hold of the rope to stop the descent and start the ascent is allowed. Constant weight without fins is the depth discipline of freediving that is most challenging, because of the physical effort needed to swim without assistance.