Roger Clemens thought so:
Some athletes may have turned to Viagra to increase stamina. A study in the the Journal of Applied Physiology found that Viagra helped improve lung function and blood flow to cyclists’ muscles during training at high altitudes.
 
      


 
   
  







![How a dying patient taught a doctor the meaning of care [PODCAST]](https://kevinmd.com/wp-content/uploads/Design-2-190x100.jpg)
