There is no doubt that running a marathon is hard on the body. It puts a tremendous amount of stress on the body and results in muscle damage, compromised immune function, kidney damage, among other things. Proper recovery post-marathon should be considered as important as proper training for the marathon.
Centre for Sleep's Medical Director, Dr. Samuels, was recently asked to provide his input on the importance of sleep in the recovery process after a marathon for Champneys Resorts blog post "The 7 Golden Rules for Marathon Recovery". Check it out!