Terre Pruitt's Blog

In the realm of health, wellness, fitness, and the like, or whatever inspires me.

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Posts Tagged ‘isometric contraction’

Dynamic Ease

Posted by terrepruitt on January 21, 2010

With every Nia routine there is an original focus and intent.  On the Nia DVD either Debbie or Carlos* explain the focus and intent that was originally intended for the routine.  With the routine Sanjana Debbie explains the focus as being Dynamic Ease.

I remember Dynamic Ease as being Dynamic and Ease.  It can either be a stretch as one might do in Yoga or could be the sensation of the muscle squeezing the bone as in an isometric contraction.  When I do the routine with Dynamic Ease as the focus I often borrow Debbie’s words and explain it as: “the energy moving out as in flexibility or the energy packing against the bone as in strength”. 

The way we play with this is that we do a lot of the moves with one quality then the other.  So while we are moving arms upward we could be calling upon the dynamic energies of strength and really squeezing the bone with the muscle.  And the next time we can move our arms up with a big stretch move the energy out.  A punch could be done strong as if we were really punching something or could be done more like a stretch. 

The ease is just moving in a relaxed yet ready type of way.  When moving arms upward, as mentioned above, we can change the quality to a nice flowing easy movement.  Or a “punch” could just be the arms moving away from the body in a soft motion.  Its fun to play and try any exercise with the different energy qualities. 
 
We can do the same moves all three ways.  Practicing going back and forth between these qualities assists in both balancing the energy in the body and balancing the body itself.  An isometric contraction calls upon big muscles and small muscles and the combination is what is used in balancing. 

I believe that it helps with the flow of fluids and energy in the body.  I know that it leaves me feeling very energetic.  I did this routine with this focus twice this week, once for my San Jose class and once with my San Carlos class and both times I felt very great energy afterwards.  In addition to the energy I feel it brings me, I think dynamic ease can serve to add another element of challenge to the Nia workout.  Dynamic Ease is one of my favorite foci for this Nia routine.

*Debbie Rosas (Stewart) and Carlos Rosas (AyaRosas) the creators of Nia

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Muscle Contractions

Posted by terrepruitt on January 19, 2010

Muscles contract.  An isotonic muscle contraction is when the length of the muscle changes.  The isotonic contraction could be a concentric contraction where the muscle shortens or an eccentric contraction where the muscle lengthens.

As an example, your arm is hanging at your side, when you lift your hand to touch your shoulder that is an isotonic contraction.  Your biceps muscles are shortening, pulling your hand up to your shoulder in a concentric contraction, your triceps are lengthening in an eccentric contraction.  Lowering your arm the biceps muscles are lengthening in an eccentric contraction and it is actually your triceps contracting in a concentric contraction that is pulling your arm down.  But since gravity is helping the triceps don’t have to work very hard.

An isometric contraction is when the muscle contracts but the length of it does not change.  For instance, when you sneeze or cough. Your abdominal muscle contracts, but unless you bend into the sneeze/cough the length does not change.

To strengthen the muscles resistance needs to be added to the contraction.  Muscle must be challenged and learn to overcome the challenge in order to become stronger.  Tension/resistance needs to be added to movement/contraction.

There are many forms of resistance; gravity, weights, bands, tubes, immoveable objects (that you try to push or pull), all of it can assist in strengthening the muscles. 

The muscles can gain strength from both the concentric contraction and the eccentric contraction.  So lowering the weight after having lifted a weight toward your shoulder in a biceps curl can contribute to strength.

When the muscles contract in a concentric contraction they are pulling on bone. But that is not be be confused with a push workout or a pull workout.  Even when you are working your “pushing muscles” your muscles are actually contracting and pulling on the bones to complete the exercise.

Muscles contract, it is the added resistance that makes them stronger.

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