Why are some people's right arm so much bigger than their left arm?
by 
Conformist
ANSWERS: 5
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Because they are right handed, that is the arm they use the most for practically everything. Logically thinking this arm would have more muscle mass as a result.
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This reminds of that one "That 70's show" where Fez gets asked "why is your right hand so much stronger than your left one?".
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The muscle that gets used gets big.
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they use it less.
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The use it more therefore they get more exercise and develops more.
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