One pec bigger then the other

  • Posted by a hidden member.
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    Jul 22, 2010 12:00 AM GMT
    For some reason ever since I've started working out my left pec has grown a little bigger then my right. I was told it would start to even out but it really hasn't, maybe thats because I'm having trouble putting on mass.
    Should i do specific exercises for my right upper chest to get them to even out? Is it that big of a deal? It definitely bothers me. Any advice would be greatly appreciated!
  • Markebri

    Posts: 110

    Jul 22, 2010 2:34 AM GMT
    I wouldn't worry about it too much, it should even out. Try working with smith machines for the time being since the weight is evenly distributed compared to using free weights. I remember hitting a plateau when one of my arms was stronger then the other.
    It became very difficult for me to do chest flies and presses with free weights since my upper body couldn't balance the weight on both sides. My right arm would constantly give out before I could even finish the rep correctly. I corrected my problem by using the smith machines for a few weeks and focused more on exercises that strengthen the stabilizer muscles.
  • trvlmscl

    Posts: 136

    Jul 22, 2010 2:51 AM GMT
    My apologies for contradicting the previous post. A smith-machine (or similar) will only result in an increased mass disparity, as the dominant pectoral muscle will compensate for the smaller side. Your best bet is to make sure that you are doing multiple chest presses using dumbells and/or machines like the Hammer Strength series, and switching up your lifts at least twice a month.
  • pexual2000

    Posts: 7

    Jul 22, 2010 2:55 AM GMT
    i have the same problem and i wondered for years until i had an X ray one day and it showed my thoracic spine was curved to one side. It also causes one of my shoulder to be higher than the other too. Maybe just get your spine checked by a doctor when you next visit a doctor.
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    Jul 22, 2010 2:57 AM GMT
    Genetics can be a bitch.
  • Posted by a hidden member.
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    Jul 22, 2010 3:51 AM GMT
    tcg1787 saidFor some reason ever since I've started working out my left pec has grown a little bigger then my right. I was told it would start to even out but it really hasn't, maybe thats because I'm having trouble putting on mass.
    Should i do specific exercises for my right upper chest to get them to even out? Is it that big of a deal? It definitely bothers me. Any advice would be greatly appreciated!


    Asymmetry is normal. In time, if you're lifting properly, it'll fix itself.

    You should perform independent movements. (Dumbells)
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    Jul 22, 2010 4:41 AM GMT
    thanks for the advice guys, guess ill just keep going at it and hitting the dumbells harder
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    Jul 22, 2010 2:44 PM GMT
    I'm in the same boat. My left pec isn't as full as the right one. As another poster attested, it usually has something to do with the body being out of alignment. I did see a chiropractor when I was about 28 and had tons of xrays and sure enough my ribs are not aligned properly. Some people are just blessed in the pec department!
  • nicelyproport...

    Posts: 573

    Jul 22, 2010 9:04 PM GMT
    I used to have the same issue.

    I solved the problem by watching my pecs (and every muscle group, really) very carefully as I lifted in order to be sure that both sides got worked the same.

    Now I'm actually complimented on my symmetry, so I guess the vigilance paid off.