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2012
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When I stand straight and relax my abdominal muscles completely enough (as if "letting my gut out"), I feel a sensation of stretching tension inside my upper chest. What is it?
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When I stand straight and relax my abdominal muscles completely enough (as if "letting my gut out"), I feel a sensation of stretching tension inside my upper chest. What is it?
1
--
10
9
8
7
6
5
4
3
2
1
0
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