The power of suggestion?

According to Patric Bach and Steven Tipper of Bangor University, the mere sight of Wayne Rooney
[a soccer player] inhibits the control you have over your feet.  Apparently, looking at
Rooney automatically triggers football-related activity in the movement
control parts of your brain, leading to the paradoxical effect of
impairing your own foot control.  By contrast, Bach and Tipper found the
sight of the British tennis player Tim Henman impairs observers’ hand
control, but not their foot control.

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