rnbflavour
Freaky Bodybuilder
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Volg de onderstaande video samen om te zien hoe u onze site kunt installeren als een web-app op uw startscherm.
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ik heb nog wel wat tips over hoe je meer nadruk kan leggen op bepaalde delen, zal ze weleens posten als ik tijd heb, want er moet nu eerst getraind worden


Paul Check zei:From: Paul Chek <PChek@compuserve.com>
Date: Mon, 16 Jun 1997 06:35:16 -0600 (MDT)
Subject: (Weights-2) Open vs Closed chain exercise
Regarding Richard Muller's question:
>What do "open kinetic chain" and "closed kinetic chain" mean?<
The terms "Open and Closed Kinetic Chain" were developed by Dr. Steindler and
my recollection of the first published item referring to the terms is "Text
Book Of Kinesiology", published in 1956. Because I am currently in Australia
lecturing and running internships I don't have access to my library and can't
give you the publisher although it is long out of print.
To simplify the terms, OPEN KINETIC CHAIN exercises are those exercises in
which the force applied by the body is great enough to overcome the
resistance. An example of an open chain exercise would be a bench press, or
any leg press which allows the force applied to move the load away from the
body.
In contrast, CLOSED KINETIC CHAIN EXERCISES are those in which the force
applied is not great enough to overcome the resistance. Examples would be the
push-up and squat exercises. To clarify for the novice list reader, even
though the load applied during the squat is on the body, the force generated
is applied to the ground, not the bar. To move the bar, the lifter must apply
a force against the earth great enough to overcome the resistance created by
the load on the bar.
How this information is relevant to Richard Muller's questions regarding knee
extensions as a means of improving squat strength:
The knee extension is performed such that the thigh is fixed to the machine,
while the knee extension force generated by the quadriceps serves to move the
tibia across the femur. In a squat, the trunk, hip and knee extensors act as
prime movers, moving the femur across the tibia, which is the fixed distal
segment (along with the foot) in this closed kinetic chain exercise. The
relevance here lies in the fact that the motor recruitment patternsfor the
knee extension are 180 degrees out of phase with the recruitment patterns
activated by the CNS to perform the squat. Another classic exampleis the
difference between performing a lat pull down and a chin-up. Any serious
climber will tell you that there is a huge difference in the strength
quality necessary to perform a closed chain pull-to-press over a rock ledge
and an open chain lat pull down."
It is this very point which must be considered when designing resistance
training programs for athletes. If for example you use an open chain leg
press in attempt to develop explosive strength for sprinting, you will NEVER
achieve optimal performance. To shed further light on this potentially "very
deep subject", when training a cyclist, you have carryover from both open
chain and closed chain exercises due to the very nature of cycling (pushing
the pedal down from a seated position vs. standing and driving a big gear or
during an intense hill climb).
I choose this example because this is where Open and Closed Chain have a grey
area:
Initially, when the cyclist stands up to drive downward on the pedal, his
body may momentarily move away from the pedal, until the arms counter the
upward movement of the body - turning the movement into an open chain
movement as the pedal descends away from the body. The same scenario can be
developed for a boxer punching an opponent in the head; the chain is closed
upon contact, yet opens as the force of the arm overcomes the momentary
resistance created by the head (a concept I am very familiar with by the
way!). This is why boxers can be seen doing both open and closed chain
exercises in their training programs, if their coach knows what he is doing!
In bodybuilding, the concept of open and closed chain is far less relevant
because there is no athletic component to bodybuilding; the goal being to
have the biggest muscles, the best proportions and a good posing routine.
Bodybuilders can benefit greatly from this information though, as alternating
between open and closed chain exercises serves to more fully develop both the
nervous system and musculature due to the variety of recruitment patterns
needed.
To give another illustration that may help clear the confusion, consider that
running is a closed chain dominant exercise (you apply force against the
earth and you move), while cycling is predominantly an open chain exercise
(press on the pedal and it moves away from you). If there was any real
transfer of strength qualities and skills developed, Carl Lewis would make a
hell of a track cyclist and the Race Across America would probably be won by
an ultra distance runner, or vice versa.
There are many other factors I could go into but it is dinner time!
This information should be standard to all who prescribe exercises. The
reasons above should make it obvious why!!
Sincerely, Paul Chek MSS, HHP, NMT
PAUL CHEK SEMINARS
US - 1-800-552-8789 New Zealand and Australia 64-9-478-2111
C.H.E.K. Institute - Leaders in Exercise Education
Zo zie je maar dat de "mythe" rond het feit dat de incline bench het claviculaire deel méér laat werken dan vlak of decline zou heel goed op een misverstand kunnen berusten. want zoals gezegd, voor dat deel zou het eigenlijk niets of bijna niets uitmaken. Het verschil zit hem vooral in het costale deel, waar er wel degelijk een verschil is. Dus het is niet het claviculaire deel dat méér werkt, maar simpelweg het costale deel dat minder werkt. Daarom dat mensen die enkel of heel vaak incline drukken, ook een gelijkmatigere groei in hun borst ondervinden, daar ze het onderste deel van de borst minder laten werken.

Met wat druk je het meest? Flat of incline?Beetje tegenstijdig lijkt me: je traint het claviculare deel niet extra, maar het costale deel doet gewoon minder
Dus het claviculare deel doet meer dus je traint het claviculare deel wél extra; tenminste, dat concludeer ik hieruit...?

Met wat druk je het meest? Flat of incline?
@ builderB: damn goed bezig, had ik nog helemaal niet aan gedacht.



Beetje tegenstijdig lijkt me: je traint het claviculare deel niet extra, maar het costale deel doet gewoon minder
Dus het claviculare deel doet meer dus je traint het claviculare deel wél extra; tenminste, dat concludeer ik hieruit...?
En hoe kan het dan dat bij veel mensen de clavicular beter ontwikkeld sinds ze incline werk doen.. geloof niet echt in die theorie. Praktijk wijst anders uit.


Ga hier maar even kijken misschien leer je er iets van....en ga eens serieus trainen....
Frederic Delavier - Discussion Message Board Forum

)
In een ander topic werd door 3XL nog heeel bedenkelijk gedaan over die knakker.
Btw, ik kan vanuit mijn professie er ook wel naar kijken, maar heb zeer weinig tijd nu. (ben fysio/manueel therapeut)
