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If you don't flex it,
it won't get stronger
it won't get stronger
Full Transcript
00:00:01.000 --> 00:00:05.129
If you don't flex it,
it won't get stronger.
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Movie Summary
Diverse personal stories from around the world reveal how lives, passions and goals are facilitated by the human body's various complex systems; narrator Jad Abumrad.