title: Avoid the iphone go into sleep mode
body: <p>I have made an iphone fitness application. 
  The issue i am unable to resolve here is that, while the application is running, the iphone goes in the sleep mode, and hence the accelerometer and sound turns off. Which i dont want to happen. </p>
  
  <p>Is there anyway i can avoid this from happening? If not that, atleast i could increase the time of my iphone to go into sleep mode. </p>
  
  <p>Regards
  Zeeshan</p>