What is Freediving - Dynamic DYN Discipline Explained
In Dynamic Apnoea, the aim is to swim as far as possible under the water horizontally rather than vertically. Competitions and record attempts usually take place in a swimming pool where the diver is allowed to use fins to assist them. Most top level freedivers now use a monofin (see below) but bifins are also allowed and are often used in training and development. The distance traveled by the DYN freediver depends mostly on how efficient their movement is through the water, as well as on the amount of air they take down with them. Turns and push-offs from the wall are allowedbut are difficult to execute efficiently with fins on. As such, a longer pool (usually 50m) is preferred for this discipline.
Dynamic: Technical Considerations
When using a monofin, DYN freedivers typically put their arms overhead in a streamlined position and use a 'kick-kick-glide' technique. This is though to give the best balance between speed and oxygen consumption.
When using bifins, athletes will ususally put the arms by the side for greater relaxation and take long smooth slow kicks with straight legs:
Dynamic :Specialist Equipment
For both dynamic pool disciplines (DNF) divers will tend to use some kind of wetsuit or a swimming speed-suit and a heavy weight worn around the neck. The suit is designed to improve streamlining through the water and the weight to create neutral buoyancy so that, even with lungs full of air the freediver is able to put all their effort into moving horizontally, rather than staying under the water. Monofins come in all shapes and sizes, from the 'mermaid's tail' for children to the full carbon competition fin, usually custom-made for a particular athlete. Pool divers often prefer a softer fin for dynamic because long swims with a stiff fin can fatigue the muscles quickly. Bifins, too, come in various different types. Those used for freediving are usually long and can be made of plastic, fibreglass or carbon fibre, though short fins will also do in the beginning. Goggles and a noseclip are usually worn on the face to prevent water going up the nose and allow the diver to see, but increasingly, top level divers are starting to dive without goggles, and even without a noseclip to help to stimulate a greater mammalian dive reflex.
IMPORTANT: Any kind of breath-hold activity in water is potentially dangerous. Don't try and do this (even just one or two lengths) without the supervision of a qualified and experienced freediver. If you don't know any freedivers, look up your local school on our freediving school directory here, or have a look on google for your local club.
Remember, Never, Ever Freedive alone.
DYN World Records
Women - Natalia Molchanova (RUS) 234m
Men - Goran Colak (CRO) 281m