London 2 Paris - By any means necessary

thats fucking nuts how do you ride a bike for 17 hours..?
doesn't just like every part of your body go numb..?
I am completely flabberghasted
I mean how do you do it..?

17? Oh, over the 3 days?

Step 1: Stop arguing with me about wearing expensive knicks :)
Step 2: Wear Assos knicks.
Step 3: Ride lots beforehand.
Step 4: Lube up (if required).