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So today we are going to go back to fundamentals.
All right?
We're going to-- we're going to pay attention to,
and we're going to learn from, the three basic laws that
govern every stroke you take.
No matter whether it's fly-back, breast or free.
The first group of laws are probably
the most important ones.
And those are the ones that I call the number one
enemy of the swimmer.
Those are the laws of drag.
The forces of drag.
They're the ones that slow you down.
We have to really pay attention to how to minimize those.
The second group of laws are the ones that allow you to go.
The laws of motion or propulsion.
And we have to maximize power to the best of our ability
to get down to the other end of the pool.
And the third law, which is called the law of inertia,
basically says, that a body in motion wants to stay in motion.
That means that we want to keep our speed constant.
There's really only two strokes that we can do that in,
and that's free and back.
The fly and breast are stop and go strokes.
They don't obey that law.
But in free and in back, we can.
We can come close to doing that.
So we're going to work on some drills for each
of those categories.
(narrator) Sculling with the head above water
while doing flutter kick is a good way
to demonstrate that an elevated head also changes the body's
position in the water.
Olympic champion and world record holder Roland Schoeman
sculls with his hands extended forward, moving them outward
and inward in a continuous motion.
While his head is above water, and his feet near the surface,
his back is arched and his bum is
several inches below the water level creating
a curve to his body.
For any swimmer, tall or short, deviating from a straight body
position will create a lot more frontal drag particularly when
swimming fast.
Elevating the head in freestyle also
contributes to increasing frontal drag
by creating more of a bow wave striking against the swimmer's
head moving forward.
Ultra marathon swimmer Lexie Kelly
demonstrates how this overly elevated head causes a huge bow
wave colliding against her head, slowing her down
with every stroke she takes.
From underwater, the elevated head position
prevents her body from being straighter
and more streamlined.
So this time, I want you to drop your chin
down almost to your chest.
And I want you to scull with your head
down in that position, and now notice
where your bum is in the water in the body position.
(narrator) Once the head is in the down position
with the line of sight directed toward the bottom of the pool
rather than forward, the body position changes instantly.
The bum comes up to the surface, and from head to toes
the body stays in alignment.
With his elbows held high in front, arms nearly straight,
Roland keeps constant pressure on his hands
with the direct sweep outward, then
immediately reverses the direction of the hands inward.
With this drill, the sculling hands
are helping to lift the front of the body.
But all the propulsion comes from the legs.
If you're a beginner or don't have enough propulsion
from your kick to do this drill well, try doing it with fins
and snorkel on to make it easier.
Don't do a little breast stroke pull,
which causes the body to bounce up and down,
or allow the hands and elbows to drop too deeply in the water,
or allow the elbows to fall back to the ears, all of which
will produce more frontal drag.
When the head is positioned correctly in freestyle
as shown by Japanese champion Junya Koga
the bow wave flows nicely over the top of the head.
The body remains a line on the surface.
And he moves forward with the least amount
of resistance possible.


Swimisodes - Improve Freestyle Technique - Head Position

1579 タグ追加 保存
Harrison Mia 2016 年 2 月 27 日 に公開
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