Left pec smaller than right.

[Ronny_Neumonic II]

Hmmm I just noticed this for the first time in a while after a shower there - my left pec is smaller and less developed than my right. Any ideas on how I can bring it up to the same standard? Or will just using dumbbells to excercise the pecs (which I've already started) work?

 

[Heizen]

Its how I made mine grow. I was a little uneven too.

Do dumbell flies, they isolate the pecs really well, and also dumbell press are what I use to work my pecs.

Have you lifted before? So is this from not lifting correctly on your left side, or is it natural? My left pec is slightly more developed then my right just because of genetics. They both lift the same weight, and I have correct form, but there are some things you cant correct. Gaining muscle mass simply made it really hard to noticel

 

[California Love]

Train both sides equally. It will eventually balance out, although it will take a while. Do not isolate and train one side more than the other. The difference you rack up in endurance and strength this way will be more detrimental than the aesthetic problem. Most people have asymetrical bodies, so don't worry about it.

 

[Alpine]

Most people have slight imbalances caused mainly by favouring your dominant side when using barbels.

How bad is it? you may notice it others not.

As above, use dumbells to press.

A good way to really move it on is to pre-exhaust that side. Do a lightish dumbell press just on that side, then follow with a barbell press.

This will really make the weaker side work.

Also look at your triceps for imbalance.

 

[DJBen]

My left pec is bigger than my right, my left tricep is bigger than my right.

So, will I think this is genetics, or maybe the fact that theres a strength/form problem?

Well, tri's and chest are hit heavy with barbell bench pressing. If my right arm is even SLIGHTLY stronger than my left, then my left arm will actually be adding more muscle, because it struggles with the weight. You get to the end of your last set and my left has worked harder than the right, so more hypertrophy occurs on the left [those last few real muscle-building reps], but strength on my right still goes up. Unless I do dumbell work to even out the strength imbalance, there will always be this problem and it's just begging to turn into a severe injury.

So I go through the stages of building identical strength in all my muscles, and I go back to BB bench presses. not only am I lifting 10-15KG more, but I feel the form is much better. After a while, my muscle size still hasnt caught up so I put it to genetics.

WRONG!

Two to three years later, I notice that my pecs and tri's are of equal size. Why was this? Strength isnt directly relational to hypertrophy, so a noticable size difference between the left/right pec/tri has evened out over time.

I think we can all be pretty symetrical with a lot of hard work and time. Sure, we wont have the symetry of ronnie coleman or many of the other Pro BB'ers, but I dont think anyone should settle for a noticable larger tricep. Ever. Dont say it's genetics until you've put your balls into it for a long time.