Practiced well, any form of concentration practice should quickly lead to crisp and fluid body movements. It can also lead to alterations in the voice.
All this really is, is a component of how dancers, singers, martial artists etc. attain those changes: paying attention.
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But unlike any of those practices, this effect lacks specificity. It seeps into everything.
Even thoughts are affected by it, getting clearer, sharper and, generally, fewer.
Potential negative effects too: cravings and negative emotions can feel a lot stronger.
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I sometimes wonder if some of the artistic reputation for excess is caused by elite artists cultivating really strong concentration abilities.
Unshackled from other practice, that's intensely en-weirdening
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One of the central points of school and other forms of institutionalisation is to blunt affect, deaden awareness, proceduralize interaction.
You start unspooling this thread, and you wind up treading back towards the wildness these things were meant to condition out of you.