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How old are my back muscles?

How old are my back muscles?

 

My back muscles are in their 30s.

How about you?

 

 

 

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Comments 2
  • Profile Image
    신혜림
    다행히 30대 나왔네요
    갈수록 안되겠죠
    • Profile Image
      눈부신날
      Author
      양 손으로 다 해봤는데 손가락이 걸리는 정도가 조금 차이가 나네요