Another fun fact: According to Mental Floss Magazine quoting a - TopicsExpress



          

Another fun fact: According to Mental Floss Magazine quoting a University of Nebraska study, grunting when hitting the ball while playing tennis adds approx 4 miles per hour to the stroke. This occurs because the grunt forcefully contracts the thoracic and abdominal wall musculature to expel the air, which increases core stability so that the extremity attachments of musculature move more powerfully! - Joe Muscolino
Posted on: Wed, 10 Sep 2014 17:10:11 +0000

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