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Norm from CSMI   The HUMAC NORM is the number one solution for measuring and improving performance in the clinic, training room, and research laboratory.


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Top Versatility with Con-Trex Multi Joint System.

With the dynamometer on a swivel arm the Con-Trex MJ System gives you the largest possible flexibility. Whether you like to evaluate or train in prone or supine position, this system makes it possible in the easiest way.

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Biodex System 4

The most popular and advanced dynamometer in the world just got better and easier to use.


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You are now at 2.0

isokineticsnetthumbIn keeping with the latest web sites has evolved.

The new site offers enhanced navigation and scalable content.

As the site has a strong international following it is now available in multiple languages.

Video tutorials have also been added to each of the testing pages. You can now watch full length videos complete with narration showing just how to position the machine and the person to be tested. 


Isokinetic Definition:

Isokinetic is a term used to describe a type of movement.
The word isokinetic is most commonly used in sports science and medicine.
In these settings isokinetic defines a type of exercise (or a strength test).
Translated literally isokinetic (i·so·ki·net·ic pronounced ī'sō-kə-nĕt'ĭk) means movement at a constant speed.
In real life isokinetic means moving a resistance at a constant speed.
The key to isokinetic exercise is:
The speed of the motion remains the same even if the resistance alters (this is contrary to Dorlands medical dictionary who have the definition wrong!).
Probably the easiest way to think of isokinetic movement is to first consider the most common type of movement we human beings perform:
Isotonic movement:
In almost every situation, every day, we perform isotonic movements. In these types of movements we pick up a fixed weight, let's say a dumbbell or even an empty pan. The weight of the dumbbell/pan is fixed but we decide how fast to lift it. We can lift it slow, fast, or anywhere in between. The key to this type of movement is we decide how fast it goes but the weight (resistance) remains constant.
Isokinetic movement:
In isokinetic movements the situation is reversed now we tell an isokinetic machine to move only at a certain speed (normally described in degrees per second). The machine will then vary it's resistance against us to maintain that speed. This means if we push against the machine hard it will give back allot of resistance to maintain the speed it was told to go at.
To achieve isokinetic movement there are many different ways of developing the resistance, however, most people use an isokinetic device. Isokinetic devices are referred to as isokinetic machines and they vary vastly in technology and price.
Most medical isokinetic machines are top of the range. They use a powerful motor to provide the isokinetic resistance to the force applied and then use a computer to keep the motion smooth, provide the acceleration and to record the results. In medical systems the components (the motor, gear box and computer control) are what make the machines so very expensive but they are also the parts that make them so very good.
Other isokinetic machines use cheaper ways of developing the isokinetic motion. These methods include (but are not exclusively) hydraulic systems (water or oil commonly) clutch based systems (not really used anymore due to noise and running costs), friction based systems and elastic resistance machines.

Isokinetic Courses: provide courses across the world (in English language only). Our courses last from 3 hours up to 7 days. This largely depends on the required content.

At we have set itineraries for 1-7 day courses. Selected examples of which can be seen below. These courses have both practical and theoretical components: 


History of introduced the first independent isokinetics information site on the 5 May 2000. During 2003 we received over 8 million visitors most searching for isokinetic information. In January 2003 the site had over 1 million visitors from all across the globe. Until the release point in May 2000 isokinetics web pages had usually been to sell you something, not this one. Here was, and still, is a free isokinetics resource with no affiliation to any companies at all (we even allow you to download the web site and run it from any computer!!).

To give you some of my history. Isokinetics and isokinetic testing were first introduced to me at university. The Cybex, isokinetic only, system was state of the art then as far as isokinetics went. But by today's isokinetic or active dynamometer standards it was rudimentary to say the least. After university gym orientated isokinetic type units (type II), in my opinion not really isokinetic, were all I had access to until I went to work in a sports injuries clinic. Isokinetic assessments and treatments were a daily activity here using a Kin-Com AP active dynamometer. I began using isokinetic tests on any patient who wanted to return to sport (as I found the Oxford strength testing system totally inadequate for muscle performance).

As my isokinetics experience grew I expanded my isokinetic testing to all my anterior cruciate ligament (ACL) patients to asses their suitability to return to more functional activities. The isokinetic testing soon expanded to replace the Oxford muscle grading system for all my patients and I introduced isokinetic training for any patients unable to improve their strength using isotonic exercise (I still believe isotonics are the best way to improve muscle performance). Using normative isokinetic values soon became out dated as (with improved skill through practice) I found myself able to do bi-lateral isokinetics tests in under 10 minutes for any joint.

Now all the members of staff at the clinic use isokinetic testing for any patient who's strength is in question. We use isokinetic bi-lateral tests pre-op for reconstructive surgery. We have replaced gravity eliminated/assisted exercises with active assisted isokinetics and use the active dynamometer to facilitate improvements in proprioception (using isotonics). Isokinetics are used to asses suitability for return to sport and daily activities and we perform isokinetic health screening for professional sports clubs and insurance investigators. The isokinetics machine is so popular we often queue to use it! As the isokinetics machine is in such demand we have had various types of machine in the department (including Cybex, Biodex, Kin-Kom, Isocom and now CSMI Norm) and we have two dedicated spine units (a lift task and a trunk flexion / extension module).

As a resource for the staff at the clinic I produced an isokinetics hand book (which started at 100 pages and is now over 500!). Following a call from local practitioners (who had isokinetics machines but did not utilize them much) I started teaching/lecturing on isokinetics and active dynamometry. In recent years I have continued to teach on the isokinetic systems and have facilitated/developed isokinetic services in sports development centres and industrial screening. I have worked with the manufacturers to develop new isokinetic machines and have also worked to attain CE marking for manufacturers.

Any questions can be directed through the forum, questions section or e-mail.

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