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I have been watching Wimbledon on TV.
When a serve is about to be delivered the player at the other end
invariably makes some preparatory movements.
These consist of a sideways rhythmic motion of the torso, apparently
most of the movement being at the hips.
The rate is perhaps 1 Hz
What advantage is there in doing this. ?
I can think of two possibilities.
1. It keeps the leg muscles ready for action and
2. It provides optical parallax thus enhancing distance perception
Are either of these explanations correct ?
--
Email— Geoffrey.Walsh@ed.ac.uk
http://www.ed.ac.uk/~gwalsh
Phone (0)131.664.3046
64, Liberton Drive,
Edinburgh
EH16 6NW
UK
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When a serve is about to be delivered the player at the other end
invariably makes some preparatory movements.
These consist of a sideways rhythmic motion of the torso, apparently
most of the movement being at the hips.
The rate is perhaps 1 Hz
What advantage is there in doing this. ?
I can think of two possibilities.
1. It keeps the leg muscles ready for action and
2. It provides optical parallax thus enhancing distance perception
Are either of these explanations correct ?
--
Email— Geoffrey.Walsh@ed.ac.uk
http://www.ed.ac.uk/~gwalsh
Phone (0)131.664.3046
64, Liberton Drive,
Edinburgh
EH16 6NW
UK
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------