From: bret.e.cahill@gmail.com   
      
   After taking hundreds of readings waking up in bed in the morning I discovered   
   I could reduce the systolic by ~ 20 mm Hg just by taking a deep breath and   
   exhaling just above/before reaching the systolic pressure.  This trick also   
   ran my pulse rate up by ~   
    15 points.  I started adding the two unrelated numbers together to get   
   something more resistant to fluctuation.   
      
   So for years whenever I was in good enough shape to swim a mile in 30 minutes   
   in surfing trunks the simple sum would ave. a solid 150.   
      
   About a year ago I had problems with my neck and could no longer sprint.  It's   
   good to sprinkle a few intervals in to break the monotony of lap swim.  Six   
   months later the BretMetric went up 15 - 20 points for comparable swim times   
   and it will not go    
   back down, even as swim times approach 2 mph.   
      
   Either the interval training is what really mattered or I've discovered a more   
   efficient swimming style, the stiff neck not so free style.   
      
   Consider the above a "text selfie."   
      
      
   Bret Cahill   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)