Art  has left a new comment on your post "Stiffer bikes for stronger bones and weight loss": 
 Not so fast.  The study was done at 90Hz and 0.2g.  The frequency is just about right for riding over 4" cobbles at 20mph, but you'll probably need a pretty squishy bike to keep the acceleration that low.  Vibrate too hard and you're killing cartilage faster than you're building bone. 
  
 
 Posted by  Art  to  Cyclelicious at  10/30/2007 07:55:00 AM 
 
