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Swimming And Biomechanics Essay

Natural forces affect the movements of swimmers in water. And it is often useful
to know how these forces act. This knowledge will help swimming teachers and
coaches analyze swimming skills and assist them to understand how these forces
influence movement, so that they can encourage beginners to be better swimmers
or good swimmers to achieve there optimum potential. Biomechanics is the branch
of science that is concerned with understanding the relationship between a
living body’s structure and function relative to movement. In this paper the
swimming form of the front crawl stroke will be analyzed, which may result in
improvement in the following areas: Improving performance Preventing
injury Correcting weaknesses Identifying ways to alter human movement
patterns ;Biomechanics is considered to be the physics of how the body
moves.

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When these physical principles are applied to sports skills it becomes an
integrated study between the internal forces produced by the body and the
naturally occurring external forces that act on the body as skills are executed
(Carr, 1997, p4.);. Although the final quality of movement will totally
depend upon the athlete’s (swimmer’s) ability to integrate both internal forces
generated by muscular actions with the external forces of gravity, buoyancy,
fiction and mass that are present during swimming. When looking at swimming one
must first look at how the human body acts and generates forces in water.
;Water is a unique environment. It possesses qualities that will assist the
swimmer, but it also has qualities that will impede the swimmer’s progress
through the water.

For instance, the water’s density provides a buoyant force
for the swimmer, while at the same time providing resistance to the swimmers
propulsion (?????, 1995, p42);. Topics to continue with: Main principles
and their application Density Water Resistance Skin/Frictional Resistance
Frontal/Wave Resistance Eddy/Turbulence Resistance Propulsion Water Friction
Propulsive Drag Lift Force Streamlining The main principles and their
application of the front crawl stoke Buoyancy ; Flotation An object that is
immersed either totally or partially in water experiences an upward force as the
water’s density endeavors to stop it from sinking (Maglischo, 1982). This upward
force is known as the buoyant force and acts through the center of the displaced
water. This force therefore, tends to counteract the effect of gravity and the
weight of the object, the net result being that the weight of the object is
reduced by the upward force of buoyancy (Costill, 1992). (#Diagram#) Every
object has an absolute center position where all forces exerted by the body
equal zero. This central point of an object’s mass is known as the center of
gravity and is the point around which it balances.

;The center of gravity
is approximately 50-52% of an individuals height, as there is an equal spread of
mass above and below this point (Allen, 1999);. The same can be said for
the center of buoyancy, as above and below this point there is an equal spread
of volume of the displaced water (Allen, 1999). The location of the center of
buoyancy which is the center of the water displaced by the body, is actually
closer to the head than in the location of the center of gravity. The reasons
for this are: The volume of water displaced has a greater mass then the chest
area. The chest has a lower density than the water because of its lung
capacity. Therefore the upward force of buoyancy acts thought a point higher up
the body than the center of gravity (Costill, 1992).

(#Diagram#) (I may need to
include more?) (And relate it back to the front crawl?) Density The term
specific gravity is used to describe the ratio between an object’s density to
that of water’s density. ;Pure water density being the ;reference
point; having a specific gravity of 1.00 (Carr, 1997, p67);. Therefore
anything placed in water will float or sink in accordance to it’s own specific
gravity value. Anything greater than 1.00, will sink.

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While anything less than
1.00 will float. In the human body there is variation from person to person,
this is due to the amount of air in ones lungs and the percentage of bone,
muscle and fat, which all vary in their own individual masses. Both bone and
muscle are heavier than fat. From this information one can assume that a lean
and muscular body or one with a heavy bone structure, will not float as well as
one that is the opposite. (Chart #1.

) Relationship between Specific Gravity
& Body Composition Studies have shown that: "in general, the specific
gravity of women will .

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Swimming And Biomechanics Essay
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Natural forces affect the movements of swimmers in water. And it is often useful to know how these forces act. This knowledge will help swimming teachers and coaches analyze swimming skills and assist them to understand how these forces influence movement, so that they can encourage beginners to be better swimmers or good swimmers to achieve there optimum potential. Biomechanics is the branch of science that is concerned with understanding the relationship between a living body's st

2019-02-12 08:17:57
Swimming And Biomechanics Essay
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