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free weights classic strength equipment against compressed..

 
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The difference between machines and free weights - I've been lifting for maybe four months now. When I started, I used the machines. After using them for a while, my russian friend scolded me for using the machines saying that it's a far better workout and far more effective use of time to..

Find out more about gym equipment and house fitness equipm.. - If you need about home machines, exercise

Find what you need, about gym equipment and sports equipme.. - Find sports sporting goods and outdoor gear at the best sports shops from around the Web.

Strength of non-olympic barbells? - I've just bought a barbell for use in the garage - just wanted to do stuff at home like cleans, HCP, and military presses. I have thought about getting some squat racks at home, too, though. The barbell I've bought is 5ft long, and has those

What other types of barbell and weights should I buy? - I am trying to set things up so that i won't have to switch plates much during my free weight training. I have the - a recline bench (simple one that take no - 2 pairs of dumb bell: 5 lbs and 10lb - 2 pairs of 2 lb weight plates..
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Author Message
Vedran Presecki

External


Since: Aug 21, 2004
Posts: 11



(Msg. 16) Posted: Sat Nov 19, 2005 2:32 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: misc>fitness>weights (more info?)

"spodosaurus" <spodosaurus.TakeThisOut@_yahoo_.com> wrote in message
news:437df31d@quokka.wn.com.au...
> Steve Freides wrote:
> > "Vedran Presecki" <vedran.presecki_remove_this.TakeThisOut@bj.htnet.hr> wrote in
> > message news:dlk22f$dgg$1@ss405.t-com.hr...
> >
> >>Do anybody know benefits of classic free weight equipment against
> >>
> >>compressed air equipment?
> >
> >
> > Please give an example of compressed air equipment.
> >
> > -S-
> > http://www.kbnj.com
> >
> >
>
> It's often used in rehab work. See also pneumatic resistance training
> equipment.

It have very little data about + and - es of this equipment...


>
> Ari
>
> --
> spammage trappage: remove the underscores to reply
>
> I'm going to die rather sooner than I'd like. I tried to protect my
> neighbours from crime, and became the victim of it. Complications in
> hospital following this resulted in a serious illness. I now need a bone
> marrow transplant. Many people around the world are waiting for a marrow
> transplant, too. Please volunteer to be a marrow donor:
> http://www.abmdr.org.au/
> http://www.marrow.org/

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Seth Breidbart

External


Since: Jan 20, 2005
Posts: 302



(Msg. 17) Posted: Sat Nov 19, 2005 2:44 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

In article <dlkjol$q6k$1@ss405.t-com.hr>,
Vedran Presecki <vedran.presecki_remove_this.RemoveThis@bj.htnet.hr> wrote:
>I think that my grammatic error is no problem
>for someone here on news groop to understand
>what I ask if this person want to help me with
>simple question on which I need answer, but if
>someone want to rib me down and show his
>behaviour and personality, be pleased...
>
>"Twat Lover" <TwatLover.RemoveThis@Cherrter.net> wrote in message
>news:87drn19tm4b3cnmaoequ3ga40842rtjk09@4ax.com...
>> On Fri, 18 Nov 2005 09:07:11 +0100, "Vedran Presecki"
>> <vedran.presecki_remove_this.RemoveThis@bj.htnet.hr> wrote:
>>
>> >Do anybody know benefits of classic free weight equipment against
>> >
>> >compressed air equipment?
>>
>> Do anybody knows english?

Do anybody knows how not to top-post?

Seth
--
There's no amount of rudeness in the world that can not be cured by the
judicious application of extreme violence. -- Roland Lee

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damifino

External


Since: Jan 21, 2005
Posts: 248



(Msg. 18) Posted: Sat Nov 19, 2005 3:01 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

On Fri, 18 Nov 2005 22:27:21 +0100, "Vedran Presecki"
<vedran.presecki_remove_this DeleteThis @bj.htnet.hr> wrote:


>It have very little data about + and - es of this equipment...

http://www.findarticles.com/p/articles/mi_m0675/is_n4_v11/ai_13240295

Something's in the air: resistance training with air-powered equipment
American Fitness, July-August, 1993 by K.C. Hamblin


Air-powered equipment, utilizing a system of compressed air, has
opened up dimensions in training that were never before possible.
These machines provide smooth, consistent resistance which translates
into less wear and tear on the body. Here are a few of the programming
opportunities this equipment provides.

* The ability to change resistance in increments of single pounds is
necessary for rehabilitating from injury or for beginners to advance
their workouts gradually.

* Starting resistance of zero on most machines is great for first-time
users.

* Unilateral or bilateral training works one or both arms/legs at a
time, which is beneficial if one area is weaker than the other.

* Whether exercising fast or slow, the resistance is not governed by
gravity so it remains constant and smooth throughout the workout.

* Smooth, safe resistance minimizes shock loading to joints and
connective tissue.

* Changing resistance during a repetition enables you to maximize
muscle fatigue for an optimum workout in less time.

Free weights and weight stack machines do not allow you to change the
resistance during an exercise movement. Pneumatics can be adjusted by
merely pushing a button or pressing a foot pedal to increase or
decrease resistance at any time during the repetition. These machines
also allow you to work in the concentric (positive) and eccentric
(negative, which research has proven enhances strength building) modes
within the same exercise. Because you have fingertip control of the
resistance, no training partners are required to assist you with
spotting.
 >> Stay informed about: free weights classic strength equipment against compressed.. 
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John

External


Since: Feb 25, 2005
Posts: 453



(Msg. 19) Posted: Sat Nov 19, 2005 3:22 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Vedran Presecki" <vedran.presecki_remove_this DeleteThis @bj.htnet.hr> wrote in message
news:dllgst$slg$1@ss405.t-com.hr...
>
> "David Jr" <DavidJr DeleteThis @perverted.net> wrote in message
> news:6cmrn1d8f5n616bnuf2chumfc5cn2fpvf2@4ax.com...
> > On Fri, 18 Nov 2005 14:09:26 +0100, "Vedran Presecki"
> > <vedran.presecki_remove_this DeleteThis @bj.htnet.hr> wrote:
> >
> > >I think that my grammatic error is no problem
> > >for someone here on news groop to understand
> > >what I ask if this person want to help me with
> > >simple question on which I need answer, but if
> > >someone want to rib me down and show his
> > >behaviour and personality, be pleased...
> > >
> >
> > I knows you not english, butt me nose you dumbazz
>
> So what, if I am not english????

Bill is a schizophrenic troll. Just ignore him.
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TheBillRodgers

External


Since: Nov 18, 2005
Posts: 9



(Msg. 20) Posted: Sat Nov 19, 2005 3:22 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

On Sat, 19 Nov 2005 00:22:23 GMT, "John"
<y_tu_momma_tambien RemoveThis @hotmail.com> wrote:

>Bill is a schizophrenic troll. Just ignore him.

No, I'm a psychotic troll, geez...
 >> Stay informed about: free weights classic strength equipment against compressed.. 
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spodosaurus

External


Since: Feb 07, 2005
Posts: 612



(Msg. 21) Posted: Sat Nov 19, 2005 4:05 am
Post subject: Re: free weights classic strength equipment against compressed air [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Steve Freides wrote:
> "spodosaurus" <spodosaurus.TakeThisOut@_yahoo_.com> wrote in message
> news:437df31d@quokka.wn.com.au...
>
>>Steve Freides wrote:
>>
>>>"Vedran Presecki" <vedran.presecki_remove_this.TakeThisOut@bj.htnet.hr> wrote in
>>>message news:dlk22f$dgg$1@ss405.t-com.hr...
>>>
>>>
>>>>Do anybody know benefits of classic free weight equipment against
>>>>
>>>>compressed air equipment?
>>>
>>>
>>>Please give an example of compressed air equipment.
>>>
>>>-S-
>>>http://www.kbnj.com
>>>
>>>
>>
>>It's often used in rehab work. See also pneumatic resistance training
>>equipment.
>
>
> I think this is a version of the often-asked "machines or free weights"
> question - that's what I was trying to get at.
>

No, it isn't. He's grouping anything that uses plates, be they free
weights or in a stack, in one category and pneumatic resistance in another.


--
spammage trappage: remove the underscores to reply

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. Complications in
hospital following this resulted in a serious illness. I now need a bone
marrow transplant. Many people around the world are waiting for a marrow
transplant, too. Please volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/
 >> Stay informed about: free weights classic strength equipment against compressed.. 
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Steve Freides

External


Since: Jan 08, 2005
Posts: 2032



(Msg. 22) Posted: Sat Nov 19, 2005 4:05 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"spodosaurus" <spodosaurus.DeleteThis@_yahoo_.com> wrote in message
news:437e08e3$1@quokka.wn.com.au...
> Steve Freides wrote:
>> "spodosaurus" <spodosaurus.DeleteThis@_yahoo_.com> wrote in message
>> news:437df31d@quokka.wn.com.au...
>>
>>>Steve Freides wrote:
>>>
>>>>"Vedran Presecki" <vedran.presecki_remove_this.DeleteThis@bj.htnet.hr> wrote in
>>>>message news:dlk22f$dgg$1@ss405.t-com.hr...
>>>>
>>>>
>>>>>Do anybody know benefits of classic free weight equipment against
>>>>>
>>>>>compressed air equipment?
>>>>
>>>>
>>>>Please give an example of compressed air equipment.
>>>>
>>>>-S-
>>>>http://www.kbnj.com
>>>>
>>>>
>>>
>>>It's often used in rehab work. See also pneumatic resistance training
>>>equipment.
>>
>>
>> I think this is a version of the often-asked "machines or free
>> weights" question - that's what I was trying to get at.
>>
>
> No, it isn't. He's grouping anything that uses plates, be they free
> weights or in a stack, in one category and pneumatic resistance in
> another.

Ach - I like my grouping better. Smile

-S-
http://www.kbnj.com


>
> --
> spammage trappage: remove the underscores to reply
>
> I'm going to die rather sooner than I'd like. I tried to protect my
> neighbours from crime, and became the victim of it. Complications in
> hospital following this resulted in a serious illness. I now need a
> bone marrow transplant. Many people around the world are waiting for a
> marrow transplant, too. Please volunteer to be a marrow donor:
> http://www.abmdr.org.au/
> http://www.marrow.org/
 >> Stay informed about: free weights classic strength equipment against compressed.. 
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Vedran Presecki

External


Since: Aug 21, 2004
Posts: 11



(Msg. 23) Posted: Sat Nov 19, 2005 4:05 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"spodosaurus" <spodosaurus.RemoveThis@_yahoo_.com> wrote in message
news:437e08e3$1@quokka.wn.com.au...
> Steve Freides wrote:
> > "spodosaurus" <spodosaurus.RemoveThis@_yahoo_.com> wrote in message
> > news:437df31d@quokka.wn.com.au...
> >
> >>Steve Freides wrote:
> >>
> >>>"Vedran Presecki" <vedran.presecki_remove_this.RemoveThis@bj.htnet.hr> wrote in
> >>>message news:dlk22f$dgg$1@ss405.t-com.hr...
> >>>
> >>>
> >>>>Do anybody know benefits of classic free weight equipment against
> >>>>
> >>>>compressed air equipment?
> >>>
> >>>
> >>>Please give an example of compressed air equipment.
> >>>
> >>>-S-
> >>>http://www.kbnj.com
> >>>
> >>>
> >>
> >>It's often used in rehab work. See also pneumatic resistance training
> >>equipment.
> >
> >
> > I think this is a version of the often-asked "machines or free weights"
> > question - that's what I was trying to get at.
> >
>
> No, it isn't. He's grouping anything that uses plates, be they free
> weights or in a stack, in one category and pneumatic resistance in
another.

Yes, that right... I finding some research and find basicly
that compressed air equipment is... how to say "selling of
air..." that there is no serious benefits of this type of equipment...
 >> Stay informed about: free weights classic strength equipment against compressed.. 
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Lee Michaels

External


Since: Jan 11, 2005
Posts: 599



(Msg. 24) Posted: Sat Nov 19, 2005 4:05 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Vedran Presecki" <vedran.presecki_remove_this DeleteThis @bj.htnet.hr> wrote in message
news:dllh3s$t1j$1@ss405.t-com.hr...
>
> "spodosaurus" <spodosaurus DeleteThis @_yahoo_.com> wrote in message
> news:437e08e3$1@quokka.wn.com.au...
>> Steve Freides wrote:
>> > "spodosaurus" <spodosaurus DeleteThis @_yahoo_.com> wrote in message
>> > news:437df31d@quokka.wn.com.au...
>> >
>> >>Steve Freides wrote:
>> >>
>> >>>"Vedran Presecki" <vedran.presecki_remove_this DeleteThis @bj.htnet.hr> wrote in
>> >>>message news:dlk22f$dgg$1@ss405.t-com.hr...
>> >>>
>> >>>
>> >>>>Do anybody know benefits of classic free weight equipment against
>> >>>>
>> >>>>compressed air equipment?
>> >>>
>> >>>
>> >>>Please give an example of compressed air equipment.
>> >>>
>> >>>-S-
>> >>>http://www.kbnj.com
>> >>>
>> >>>
>> >>
>> >>It's often used in rehab work. See also pneumatic resistance training
>> >>equipment.
>> >
>> >
>> > I think this is a version of the often-asked "machines or free weights"
>> > question - that's what I was trying to get at.
>> >
>>
>> No, it isn't. He's grouping anything that uses plates, be they free
>> weights or in a stack, in one category and pneumatic resistance in
> another.
>
> Yes, that right... I finding some research and find basicly
> that compressed air equipment is... how to say "selling of
> air..." that there is no serious benefits of this type of equipment...
>

What we would call "hot air".
 >> Stay informed about: free weights classic strength equipment against compressed.. 
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Vedran Presecki

External


Since: Aug 21, 2004
Posts: 11



(Msg. 25) Posted: Sun Nov 20, 2005 1:00 pm
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"John" <y_tu_momma_tambien.DeleteThis@hotmail.com> wrote in message
news:3fuff.125491$zb5.123555@bgtnsc04-news.ops.worldnet.att.net...
> "Vedran Presecki" <vedran.presecki_remove_this.DeleteThis@bj.htnet.hr> wrote in
message
> news:dllgst$slg$1@ss405.t-com.hr...
> >
> > "David Jr" <DavidJr.DeleteThis@perverted.net> wrote in message
> > news:6cmrn1d8f5n616bnuf2chumfc5cn2fpvf2@4ax.com...
> > > On Fri, 18 Nov 2005 14:09:26 +0100, "Vedran Presecki"
> > > <vedran.presecki_remove_this.DeleteThis@bj.htnet.hr> wrote:
> > >
> > > >I think that my grammatic error is no problem
> > > >for someone here on news groop to understand
> > > >what I ask if this person want to help me with
> > > >simple question on which I need answer, but if
> > > >someone want to rib me down and show his
> > > >behaviour and personality, be pleased...
> > > >
> > >
> > > I knows you not english, butt me nose you dumbazz
> >
> > So what, if I am not english????
>
> Bill is a schizophrenic troll. Just ignore him.

Smile
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Vedran Presecki

External


Since: Aug 21, 2004
Posts: 11



(Msg. 26) Posted: Mon Nov 21, 2005 1:40 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

<damifino DeleteThis @oldman.org> wrote in message
news:djqsn1140so95cbpoedcdedkj85a84bm8j@4ax.com...
> On Fri, 18 Nov 2005 22:27:21 +0100, "Vedran Presecki"
> <vedran.presecki_remove_this DeleteThis @bj.htnet.hr> wrote:
>
>
> >It have very little data about + and - es of this equipment...
>
> http://www.findarticles.com/p/articles/mi_m0675/is_n4_v11/ai_13240295
>
> Something's in the air: resistance training with air-powered equipment
> American Fitness, July-August, 1993 by K.C. Hamblin
>
>
> Air-powered equipment, utilizing a system of compressed air, has
> opened up dimensions in training that were never before possible.
> These machines provide smooth, consistent resistance which translates
> into less wear and tear on the body. Here are a few of the programming
> opportunities this equipment provides.
>
> * The ability to change resistance in increments of single pounds is
> necessary for rehabilitating from injury or for beginners to advance
> their workouts gradually.
>
> * Starting resistance of zero on most machines is great for first-time
> users.
>
> * Unilateral or bilateral training works one or both arms/legs at a
> time, which is beneficial if one area is weaker than the other.
>
> * Whether exercising fast or slow, the resistance is not governed by
> gravity so it remains constant and smooth throughout the workout.
>
> * Smooth, safe resistance minimizes shock loading to joints and
> connective tissue.
>
> * Changing resistance during a repetition enables you to maximize
> muscle fatigue for an optimum workout in less time.
>
> Free weights and weight stack machines do not allow you to change the
> resistance during an exercise movement. Pneumatics can be adjusted by
> merely pushing a button or pressing a foot pedal to increase or
> decrease resistance at any time during the repetition. These machines
> also allow you to work in the concentric (positive) and eccentric
> (negative, which research has proven enhances strength building) modes
> within the same exercise. Because you have fingertip control of the
> resistance, no training partners are required to assist you with
> spotting.

Great post!
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Jason Earl

External


Since: Mar 07, 2005
Posts: 660



(Msg. 27) Posted: Mon Nov 21, 2005 2:36 pm
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

damifino.RemoveThis@oldman.org writes:

> On Fri, 18 Nov 2005 22:27:21 +0100, "Vedran Presecki"
> <vedran.presecki_remove_this.RemoveThis@bj.htnet.hr> wrote:
>
>
>>It have very little data about + and - es of this equipment...
>
> http://www.findarticles.com/p/articles/mi_m0675/is_n4_v11/ai_13240295
>
> Something's in the air: resistance training with air-powered equipment
> American Fitness, July-August, 1993 by K.C. Hamblin
>
>
> Air-powered equipment, utilizing a system of compressed air, has
> opened up dimensions in training that were never before possible.
> These machines provide smooth, consistent resistance which
> translates into less wear and tear on the body. Here are a few of
> the programming opportunities this equipment provides.

These machines also force your body to move in straight lines. In
some cases this puts *more* wear and tear on your joints.

> * The ability to change resistance in increments of single pounds is
> necessary for rehabilitating from injury or for beginners to advance
> their workouts gradually.

Or for a lot less money you can simply by fractional plates (or some
large washers at the hardware store).

> * Starting resistance of zero on most machines is great for
> first-time users.

Zero resistance? Why not just sit on the couch. With weights if you
need "minimal" resistance you can lift soup cans instead of dumbbells.

> * Unilateral or bilateral training works one or both arms/legs at a
> time, which is beneficial if one area is weaker than the other.

Dumbbells.

> * Whether exercising fast or slow, the resistance is not governed by
> gravity so it remains constant and smooth throughout the workout.

This doesn't even make sense. You have to have a pretty wacky gym for
gravity to not be constant.

> * Smooth, safe resistance minimizes shock loading to joints and
> connective tissue.

In other words it only provides resistance for the concentric part of
the movement.

> * Changing resistance during a repetition enables you to maximize
> muscle fatigue for an optimum workout in less time.
>
> Free weights and weight stack machines do not allow you to change
> the resistance during an exercise movement. Pneumatics can be
> adjusted by merely pushing a button or pressing a foot pedal to
> increase or decrease resistance at any time during the
> repetition. These machines also allow you to work in the concentric
> (positive) and eccentric (negative, which research has proven
> enhances strength building) modes within the same exercise. Because
> you have fingertip control of the resistance, no training partners
> are required to assist you with spotting.

This can be accomplished using free weights by picking up some chains
or some bands. Or, in the case of most gym rats, by having a spotter
row most of the weight up for you while you are bench pressing.

In short, these machines don't sound particularly effective. Unless
they are significantly less expensive than free weights it probably
isn't even worth bothering with them.

Jason
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damifino

External


Since: Jan 21, 2005
Posts: 248



(Msg. 28) Posted: Tue Nov 22, 2005 8:22 am
Post subject: Re: free weights classic strength equipment against compressed air equipment? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

On Mon, 21 Nov 2005 11:36:47 -0700, Jason Earl <jearl.DeleteThis@xmission.com>
wrote:

>damifino@oldman.org writes:
>
>> On Fri, 18 Nov 2005 22:27:21 +0100, "Vedran Presecki"
>> <vedran.presecki_remove_this.DeleteThis@bj.htnet.hr> wrote:
>>
>>
>>>It have very little data about + and - es of this equipment...
>>
>> http://www.findarticles.com/p/articles/mi_m0675/is_n4_v11/ai_13240295
>>
>> Something's in the air: resistance training with air-powered equipment
>> American Fitness, July-August, 1993 by K.C. Hamblin
>>
>>
>> Air-powered equipment, utilizing a system of compressed air, has
>> opened up dimensions in training that were never before possible.
>> These machines provide smooth, consistent resistance which
>> translates into less wear and tear on the body. Here are a few of
>> the programming opportunities this equipment provides.
>
>These machines also force your body to move in straight lines. In
>some cases this puts *more* wear and tear on your joints.
>
>> * The ability to change resistance in increments of single pounds is
>> necessary for rehabilitating from injury or for beginners to advance
>> their workouts gradually.
>
>Or for a lot less money you can simply by fractional plates (or some
>large washers at the hardware store).
>
>> * Starting resistance of zero on most machines is great for
>> first-time users.
>
>Zero resistance? Why not just sit on the couch. With weights if you
>need "minimal" resistance you can lift soup cans instead of dumbbells.
>
>> * Unilateral or bilateral training works one or both arms/legs at a
>> time, which is beneficial if one area is weaker than the other.
>
>Dumbbells.
>
>> * Whether exercising fast or slow, the resistance is not governed by
>> gravity so it remains constant and smooth throughout the workout.
>
>This doesn't even make sense. You have to have a pretty wacky gym for
>gravity to not be constant.
>
>> * Smooth, safe resistance minimizes shock loading to joints and
>> connective tissue.
>
>In other words it only provides resistance for the concentric part of
>the movement.
>
>> * Changing resistance during a repetition enables you to maximize
>> muscle fatigue for an optimum workout in less time.
>>
>> Free weights and weight stack machines do not allow you to change
>> the resistance during an exercise movement. Pneumatics can be
>> adjusted by merely pushing a button or pressing a foot pedal to
>> increase or decrease resistance at any time during the
>> repetition. These machines also allow you to work in the concentric
>> (positive) and eccentric (negative, which research has proven
>> enhances strength building) modes within the same exercise. Because
>> you have fingertip control of the resistance, no training partners
>> are required to assist you with spotting.
>
>This can be accomplished using free weights by picking up some chains
>or some bands. Or, in the case of most gym rats, by having a spotter
>row most of the weight up for you while you are bench pressing.
>
>In short, these machines don't sound particularly effective. Unless
>they are significantly less expensive than free weights it probably
>isn't even worth bothering with them.
>
>Jason

I wouldn't buy or use air-powered stuff. Free weights and rubber
bands work fine for me.

But if someone wants to use air-powered equipment, may the force be
with them!

http://www.adirondackclub.com/Links/body_links.html

www.keiser.com. Started in 1974 by Dennis Keiser, this company
introduced the first air powered exercise machines for strength
training. Air power provides both positive and negative resistance
uniformly and smoothly throughout the entire range of motion. Air
replaces the stacks of iron weights commonly used in this type of
exercise. Keiser is also a world leader in research and its effect on
aging.


http://www.keiser.com/products.htm#1
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