One-finger exercise reveals unexpected limits to dexterity

"Push your finger as hard as you can against the surface. Now as hard as you can but move it slowly - follow the ticking clock. Now faster. Now faster."

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<p><a href="http://www.physorg.com/news166251775.html">One-finger exercise reveals unexpected limits to dexterity</a></p> <p>"Push your finger as hard as you can against the surface. Now as hard as you can but move it slowly - follow the ticking clock. Now faster. Now faster."</p>