Eli5:Why can’t smooth muscles be trained like skeletal and cardiac muscles?
In: Biology
Most of the smooth muscle in the body is outside of conscious control and, unlike the heart, not readily subject to manipulation by conscious effort. Trying to “work out” your intestinal walls isn’t likely to succeed, and things like your iris just don’t have any significant resistance against their movement. I don’t know why anyone would try either, there isn’t really any cosmetic or health benefits to having a buff gallbladder or similar.
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