Tip no. 1 to prepare for your marathon:
increase very gradually!
For lots of marathon runners the first challenge is to avoid arriving on the starting line with an injury… Muscles and joints are under great strain when running and injuries are relatively frequent (tendinitis, periostitis, etc.).
To limit the risks, very gradually increase the amount of training. If you haven’t done any running for a long time or are overweight, start your workouts with brisk walking, then alternate walking and running before finally running continuously.