2 types of pecs.

[blackcatfever]

ever notice that endurance runners look like they have long muscles in their legs and sprinters tend to have thicker muscles....that's the correlation between muscles. you are born with a certain amount of each type of muscle so genetics have a role in deciding how many of each fibers you have and each fiber shapes your muscle differently

 

[Mudge]

Sprinting requires explosive strength, endurance requires simply going the distance - with such a scenario having loads of muscle is NOT going to allow the body to do so. This is why cardio can be a muscle killer, if you tell the body to get better at going the distance then muscle must go.

Look at dragsters, torque up the bunghole gets them MOVING, not having a 34 MPG engine.

Gators and crocks are the same, they can be very quick and powerfull for short time periods, then they are spent and rest for long periods to recouperate.

 

[L34lo1]

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[Logical]

the shape of your muscles is almost entirely genetics

for the most part, all you can do is make them bigger



if you have wide pecs or long biceps, no combination of exercises is going to magically change that

 

[USAF]

Are there two different types of pecs? I think there is........

Me and my best friend started training together when we were like 13 years old. We always did the same exercises, but my chest got wider, and his got thicker, and we were always the same strength. Even today, my chest is alot wider and flatter, but his is half the width of mine, but sticks out more.

This is what I mean. The top picture is how my chest is, and the bottom picture is how my friend is.

I guess its just how we are born to grow.

Flat and wide.

You cannot change the shape of your pecs, but you certainlly can try and isolate a certain area.

I have always heard that flat wide grip benches 'HELPS' develop a wider chest while dumbell benches add that thinkness. Just what i have heard. I dont know if it true, because I incorperate both into my routine.

 

[Kevn594]

its all genetics man. my chest is strange too. Even really lean, my chest is built very think of the outside as i am working on the inner. everyone is built different

 

[voidofRoids]

The problem with isolating portions of the chest is that it is limited in it's division; the chest is only divided into two partitions: the pectoralis major and pectoralis minor. The only way isolation would differentiate, is if we can definitively associate depth (thickness) with a combination of development in both the major and minor. That simply leaves the concept that the major is cause of a wide chest; the pectoralis major would be overdeveloped and the pectoralis minor underdeveloped.

This concept is far from outrageous, but I've yet to see any scientific study proving it, it is mostly just speculation. In fact it is very probable - but still, nothing supporting it but broscience.

OP: if the above is true, the subsequent answer to your question would be a combination of genetics and (if you are both performing the same exercises) form, positioning, range of motion, etc. (which can also be impacted by genetics).

 

[MotorIHead]

This thread is from 2004 guys.....

 

[randomdude93]

i may be able to vouch for this. my chest is thick rather than wide and i spent my first 2 years training at a gym that didnt have bench, just dumbbells.
i know this thread is a couple years old but im sure people, like myself, are still scouring the internet for answers as to how they can alter their chest shape

 

[imdennis]

i may be able to vouch for this. my chest is thick rather than wide and i spent my first 2 years training at a gym that didnt have bench, just dumbbells.
i know this thread is a couple years old but im sure people, like myself, are still scouring the internet for answers as to how they can alter their chest shape

you realize this is from 2004....

 

[Hrnyfckr]

We are all born with the body we have. You can't make yourself taller. Ecto morphs will always have a hard time with "mass." Endomorphs will always have body fat issues. The same is true of muscle shape. My lats sit high on my upper back, for example. While I have very broad shoulders and a tiny waist, I have a hard time showing a thick v-shape.
In the end of the day, you have to work with what you've got. Accentuate and build the positive parts of your physique. And minimize or at least "balance" out your defects.
While I may never acquire broad, thick v-shape lats; I have awsome traps, broad shoulders, and great rear delts. So I work on these positives intently.
This is what makes body building fun for me. I may not have the genetics to ever be Mr. O, but I can be the best "me" that I can be!