On 12/15/98 12:04:02 you wrote:
>
>At 18:56 13/12/98 EST, you wrote:
>>So, as was commented originally: "Why anyone would do leg extensions
in a
>>seated position is a good question". Indeed! Why on earth would
anyone
>>regularly choose to do ANY isolated or 'strict' exercise?
As far as I can tell knee extension is still a movement and although it
does isolate the quads I think it can be useful for strengthening. In
a JOSPT article this year it was discussed that examination of gait
reveals there is open and closed chain activity and therefore isolated
closed chain activity is not the only way of doing things any more.
Now, who knows what percent open versus closed chain activity should be
done?
>>
>>
>>
>I don't know about American or South African Physios Dr Siff, but here
in
>Australia Physios have realised the importance of functional "closed
chain"
>rehab for many years. Since a paper was published in 1991 in Sports
>Medicine (Palmitier, Kai-Nau, Scott and Chao. Kinetic Chain Exercise
in
>Knee Rehabilitation. Sports Medicine 11 (6): 402-413) most physio's
worth
>their salt are instituting closed chain programmes as early as
possible ,
>with virtually all knee surgeons eliminating open chain knee extension
from
>their post operative protocols. From what I can gather, the
preoccupation
>in the States with all things mechanical means that isokinetic
machines are
>very popular there.
As a US P.T. I don't know of anyone who uses Isokinetics currently. In
the US time cuts and visit cuts have cut out the use of isokinetics
since they are so time consuming and as you well state there are many
other exercises to do than on the isokinetic "machine". But, the
isokinetic machine is good for quantifying strength and allowing the
patient to see there is progress, i.e. working on the "Big Muscle"
between the ears.
Any Physical therapy/Rehab text book emanating from the
>US invariably has an entire chapter devoted to isokinetics. In
practice in
>Sydney, I think there are only a handful of isokinetic machines,
usually in
>clinics at Universities where they are used for research purposes.
>
>i think the message is also making it's way to Human Movement and
Exercise
>Science programs, as many of the Gym instructors now have an excellent
>knowledge of the biomechanics and arthrokinematics of open vs closed
chain
>work (although some don't!)
As for the books, isokinetics has some benefits for measuring strength
and describing the different types of output on the velocity/force
spectrum and is useful to describe what is happening with the muscle
and joint.
>
>regards
>
>Matt McEwan
>B App Sc (Physio)
>M App Sc (Sports Physio)
>Parkside Sports Physiotherapy
>Sydney, Australia
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>
>
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