Running

A few odds & ends about ultras I've picked up from people in my running club who do them regularly:

• long runs rarely (never?) seem to go over 30miles, but they do two on back-to-back days (e.g. 20 on Sat, 20 on Sun)
  
• you will get injured
  
  

The staff at Run and Become may be able to give you some good advice as they're mostly in the (semi-cult) Sri Chinmoy running club; that lot love ultras.