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un even development of muscle

Genetics as it applies to evolution, molecular biology, and medical aspects.

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un even development of muscle

Postby teju85 » Tue Jul 30, 2013 2:03 pm

Hello all. I have one question regarding human genetics. Is really true, that we are really asymetric?
I have recently joined a fitness club (few months ago) and started to work out. I understand why my right arm is stronger and can lift more than my left one (because I am right handed), but I don't understand why my left breast muscle is obviously bigger than my right breast muscle? Is this normal? I do bench presses and I feel that my left muscle is much stronger than my right one. I do un even bench presses as result.
What do you think?
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Postby Darby » Thu Aug 01, 2013 3:16 pm

In the skeleton and muscle area, we're supposed to be bilaterally symmetrical. Not everyone is, for a number of possible reasons.

You could have picked up some imbalance as an embryo, or you maybe it's how you exercise.

Most activities use more than one muscle, and even "identical" exercises might be using a different mix of prime mover and synergist. Some try to focus on particular muscles, but that's hard to do reliably. Your left pectoral may be working hard at lifts that, on your right side, are being aided more by arm and shoulder muscles. Or, you may actually be doing them differently, from slightly different positions.
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Re:

Postby teju85 » Fri Aug 02, 2013 11:24 am

Darby wrote:In the skeleton and muscle area, we're supposed to be bilaterally symmetrical. Not everyone is, for a number of possible reasons.

You could have picked up some imbalance as an embryo, or you maybe it's how you exercise.

Most activities use more than one muscle, and even "identical" exercises might be using a different mix of prime mover and synergist. Some try to focus on particular muscles, but that's hard to do reliably. Your left pectoral may be working hard at lifts that, on your right side, are being aided more by arm and shoulder muscles. Or, you may actually be doing them differently, from slightly different positions.


Yes, that sounds like a reasonable explanation. I always try to do my best when weight lifting and I try to focus on a particular muscle group. I understand that no move is generated by only 1 muscle - stabilization muscles are always doing the work as well.
But that would mean that my whole body would be un-even, but only chest muscles are involved in my case. Probably because I build chest the most I guess (besides biceps, shoulder and legs)...
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Postby balamurugan3 » Fri Aug 09, 2013 2:01 pm

Although people claim mammals are bilateraly symmetrical based on morphology, we have assymmetry on the anatomical and physiological level

1. heart is always in the left or one side
2. Organs like spleen, liver and looping of intestine is always on the one side right or left
3. even human brain has right and left assymmetry, they divide tasks
4. At the functional level, right handed people have inablitly to do all activities in left hand
5. this happens even in eye, lungs and nostrils. As a result no one will stand in a perfect symmetrical way or walk perfectly symmetrical

In the same lines, every human have anatomical and fucntional assymetry exemplified in sports. Every sports person have a dominant leg or hand. a person on disc throw cannot perform the same task equally on both hands. Seasoned bodybuilders have assymetry but meticulous to hide such variations by posing or photographs by introducing assymetry in their posing.

Experts claim that assymetry can be reduced (in muslces) by unilateral training. using more dumbells, training more one arm than the other. As far as chest, I am not sure...
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Re: un even development of muscle

Postby teju85 » Wed Nov 13, 2013 10:35 pm

I'm back :) after 3 months.
Now I'm going to the gym for 6 months and still have un-even performance. I thought that this will even out soon, but It didn't. I'm using dumbells for chest workout now, but left breast is still much stronger than right one :)
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