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One of my legs is noticeably more muscular than the other. I am also more prone to knee pain in the more muscular leg.

Could this be related to my frequent (I ride 5+ days a week) cycling habit? Are there any exercises I can do to even this up? I have to walk/climb stairs a lot at my job...

Should I even care about this? What habits can I break that might cause this?

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closed as off-topic by PeteH, mattnz, Móż, Gary.Ray Jul 20 '14 at 22:54

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "General health and medical advice is off-topic here; you should contact a qualified medical professional instead." – PeteH, mattnz, Móż, Gary.Ray
If this question can be reworded to fit the rules in the help center, please edit the question.

Yes you should care. If you are doing even exercise that is not normal. See a doctor. Even as a tennis player you don't see much difference in muscle mass from one arm to the other. – Paparazzi Jul 19 '14 at 19:37
It sounds like it could be related, but you need to go to a physiotherapist. I doubt if any of us on here is qualified to advise, forthermore this type of question is off-topic pretty much by definition. Bear in mind anyone giving the wrong advise will make things worse for you. – PeteH Jul 19 '14 at 20:20
You might be interested in the Health proposal, which is now in commitment phase. – Franck Dernoncourt Oct 24 '14 at 14:57

It's normal to have a small amount of imbalance on one side vs the other. Significant imbalance can be due to injury or neurological issues on the weaker side. If either of those apply, it's also common to have knee pain on the stronger side as it is trying to make up for the weaker side. Even after recovering from injury or neurological problems, it can take months for the weaker side to catch up, even longer without physical therapy.

Have you ever hurt your knee, leg, foot hip, or ankle on the weaker side? Any lower back problems? Sometimes nerve impingement can manifest itself as weakness without pain, but it's more common to have both.

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+1. Complete bilateral symmetry is a myth. SERIOUS imbalance may be something to investigate, but minor is more typical than atypical. – keshlam Jul 20 '14 at 4:51

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