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Free-diving is an aquatic
sport, considered an extreme sport, in which
divers attempt to reach great depths unassisted
by breathing devices.
The human body has several adaptations
under diving conditions, which stem from
mammalian diving reflex. These adaptations
enable the human body to endure depth and
lack of oxygen far beyond what one would
expect.
Freediving Disciplines:
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Constant
Ballast - The diver must
descend and ascend kicking and/or
using his arms completely unassisted.
It is optional to use weights, masks,
google or nose clips.
Dynamic
Apnea - This discilpline is
divided by two. Dynamic Apena with and
without fins. The divers swim horizontally
under water in a swimming pool in a
single breath hold.
Static
Apnea - The diver holds his/her
breath for as long as possible with
his/her face immerged in a swimming
pool.
Free
Immersion - The diver must
descend and ascend by pulling on the
rope. Weight may be worn, but the diver
must return to the surface with the
same amount of weight used for the descent.
No fins are used for this discipline.
Variable
Ballast - The diver descends
on a weighted sled and returns to the
surface under his or her own power,
either kicking and/or pulling on the
rope, or a combination.
No
Limits - The diver descends
on a weighted sled and returns to the
surface using a lift bag that is inflated
by the diver at depth. This is the deepest
category of Freediving involving very
little physical exertion and an enormous
amount of mental control. 