Fundamental of swimming :- You certainly know the famous 3 mathematical rule. Swimming is also based on a rule of 3, much easier to remember, but not that easy to keep in mind and implement the best:
For that a human body moves on the water, you should:
A body floats if its exposed surface directly to the water is sufficient in relation to its weight.
Of course, this is shown schematically, and the second parameter that comes into account is the very constitution of the body. Here, I assure you, the human body is certainly heavy, but consists of cavities, and it floats, though! All human bodies float (without clothes on well).
It will help the waterline by a maximum down on the water. In fact, now that the fact that fleet acquired two things we will pre-occupy:
1) Knowing that a floating body is a body that does not flow, the distance from the fleet area it you? It must be as ready as possible.
A remark that you have already apply: when the body is elongated, the upper body (trunk) floats better than the lower body (legs). The heaviest part is the head.
2) The position in which the body fleet should allow breathing (component discussed below).
Knowing that the head (heavy) must rise to breathe, particular monitor the position and movement of the head.
Knowing that the legs are heavier than the upper body, a part of the propulsive power will be used to aid buoyancy.
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Floating is good, forward is better. Two elements are then off to create propulsion (as sloped pools are not yet developed, and rafting and canyoning are not considered Swimming, it will do with): The arms and legs .
The arms provide the bulk of propulsive power. Celon swims, they work TRACTION (water is drawn) or by PUSH (water is pushed), a longitudinal axis parallel to the imaginary axis of the body, from head to toe.
In fact, any movement located before (higher than) the axis of the shoulders (imaginary axis perpendicular to the axis of the body, through the 2 shoulders) will be considered pulling movement, and movement located after (lower than ) as thrust.
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The legs will be used to advance and maintain the lower body lying closer to the surface as possible. Warning: the leg muscles are important (especially thighs, one of the biggest of the body) and thus consume a lot of energy (oxygen among others) use them sparingly.
Let us keep in mind that the movements thus serve both: propulsion + buoyancy aids; This is the subtle sombinaison 2 that creates the magical alchemy: I swim!
A small aircraft reminder to confirm how to form lift (buoyancy aids). For us swimmers, it’s not the water that come to us, but our mechanical force that moves water.
So the direction of the hands notament who will play this role of “blender” between lift (buoyancy aids) and drag (energy propulsion).
You will have the opportunity to explore these intricacies and perfect the techniques in the sections devoted to each of the medley.