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Iso-Dynamic Muscle Control is not VRT
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John Peterson John Peterson is offline
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Join Date: Feb 2008
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06-11-2018, 10:00 PM
Hello Everyone,

I received an e-mail from a well meaning man asking if what I now refer to as Iso-Dynamic Muscle Control (IDMC) is the same as VRT.

Answer: The approach used in Iso-Dynmic Muscle Control is slightly different than VRT.

With VRT (Visual Resistance Training) you are advised to visualize yourself lifting extremely heavy weights, boulders, trees or anything else that you would desire. Depending upon your ability to visualize...the results can be fantastic. If, for instance you know how it feels to perform curls or presses with a pair of 50 pound dumb bells there is no reason that you cannot learn to contract your muscles at that same level of intensity or more using the visualization technique that Greg Mangan, the developer and originator of VRT advises. This method of visualization was also taught in great detail by Frank Rudolph Young, Adolph Nordkvist and many other Physical Culturist of the late 19th and early 20th centuries. It works.

With Iso-Dynamic Muscle Control the emphasis IS NOT in visualizing that you are lifting anything. Instead the emphasis is in direct contraction of the opposing muscle structures by intentionally contracting your opposing muscles (your antagonist) against your performing (agonist) muscles and thereby compelling both sets of muscles to work powerfully against each other. This is what is meant by the term 'muscle control'.

So the secret to Iso-Dynamic Muscle Control is then to tense your antagonist muscles hard, thereby compelling the performing muscles (agonist) to tense harder still to overcome the increased resistance to their action. This method was first developed and mastered by Alois P Swoboda. It was Swoboda that was the first to coin the term 'muscle control'. Mastering this method then is done by attaining conscious control over both sets of muscles and contracting them in opposition to each other. Call it whatever you like but the point of the methodology is consciously contracting antagonist and agonist muscle groups against each other. This of course is the secret to mastering Tiger Moves. I once heard it described as 'moving your car with the parking brake fully engaged.' In a way...thats a reasonably good description of how it feels.

---John Peterson
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