1

votes

Left bicep more pronounced than right?

Answered on August 19, 2014
Created July 31, 2012 at 3:48 PM

This is an odd question, so forgive me for potentially sounding really dumb. Since starting Paleo I've noticed a tremendous improvement in musicle tone, especially in my biceps. However, my left bicep is noticably larger/more toned and defined than my right. As far as I can tell there shouldn't be any reason for this, I work them both equally hard, and strength-wise I don't notice any difference between the two, but there is a huge difference in appearence. Any insights into this?

This isn't an ego thing either, I couldn't give a bag of craps about "looking jacked", etc., It just seems like an odd problem to have.

E0f5cc680bb8ae31c07abeb706d70a15

(370)

on July 31, 2012
at 06:04 PM

What exactly is unilateral training? Also, I have noticed that my arms are a bit uneven in length, could that have something to do with it?

F5be4be097edc85690c12d67ee1a27c0

(1884)

on July 31, 2012
at 04:16 PM

Oh yeah, also are you doing dumbbell exercises? I noticed a big difference in switching from barbell to dumbbell. It really strengthened by left side.

F5be4be097edc85690c12d67ee1a27c0

(1884)

on July 31, 2012
at 04:10 PM

I haven't researched it or anything, but I wonder if your right arm has a different composition than your left... like the right "stuff" needed to build actual muscle fibers.

E0f5cc680bb8ae31c07abeb706d70a15

(370)

on July 31, 2012
at 04:07 PM

I actually am right-handed, but that's a good idea, I'll start doing with with my right arm day-to-day and see if there's any change. And yes, using the same weights on each side.

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4 Answers

1
E6c14efded576a0bea38a2fe2beced6a

on July 31, 2012
at 05:39 PM

Have you taken any measurements to better define what "a huge difference" is? There will always be some type of imbalance just because of minor differences between left and right on insertion points, leverages, etc. Depending on your size a 1/4" difference between sides is not unheard of.

You would also want to do some unilateral testing to see if one side is stronger, but that is hard to do by yourself unless you can really be honest. You would also want to test the range of motion of everything to note any differences between the sides that might have an effect.

Once you have gone thru that then you can start to address what might be the problem if there is one.

If it turns out, like most people, that one side is simply a bit larger than the other you would need to look at unilateral training to try and bring it up, but that would cause imbalance issues that could cause more problems than what you are fixing.

E0f5cc680bb8ae31c07abeb706d70a15

(370)

on July 31, 2012
at 06:04 PM

What exactly is unilateral training? Also, I have noticed that my arms are a bit uneven in length, could that have something to do with it?

1
7767e05a8c4504f6be03f13ee40815cd

(1299)

on July 31, 2012
at 04:58 PM

I also have a larger left bicep, despite being right-handed and working both sides on all lifting movements. In fact, for movements where the arms are worked independently like DB rows, my right arm is slightly stronger. My right leg is both slightly stronger and larger than my left, so this isn't a full-body thing either.

I have asked some more experienced lifters about this and they just advise to keep moving and that differences will tend to become less significant as one lifts heavier weights with both sides.

Failing that, you could do some more focused bodybuilding-style training for areas you'd like to grow.

0
Ee70ee808f748374744404a00e1c22ed

(1163)

on July 31, 2012
at 04:22 PM

I think it just comes with the amount of use- I'm left-handed, and all of my muscles on my left side- lat, pec, shoulder, and upper-arm musculature- are slightly more hypertrophied than on my right side. I've tried to even things out a bit, but short of teaching myself to be ambidextrous, I don't think it's going to happen. Bottom line, I think slight differences in hypertrophy are natural, and not something to worry about too much.

0
F5be4be097edc85690c12d67ee1a27c0

on July 31, 2012
at 04:04 PM

You are probably left handed, right? You could start doing more things with your right hand during the day... carrying groceries in with the right hand, etc.

I trust that you are using the same weights on each side since you said no and noticed no strength issues.

E0f5cc680bb8ae31c07abeb706d70a15

(370)

on July 31, 2012
at 04:07 PM

I actually am right-handed, but that's a good idea, I'll start doing with with my right arm day-to-day and see if there's any change. And yes, using the same weights on each side.

F5be4be097edc85690c12d67ee1a27c0

(1884)

on July 31, 2012
at 04:16 PM

Oh yeah, also are you doing dumbbell exercises? I noticed a big difference in switching from barbell to dumbbell. It really strengthened by left side.

F5be4be097edc85690c12d67ee1a27c0

(1884)

on July 31, 2012
at 04:10 PM

I haven't researched it or anything, but I wonder if your right arm has a different composition than your left... like the right "stuff" needed to build actual muscle fibers.

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