Based on the context and the answer, generate a question. 

Context: I swear I even walked backwards for a while cause it did n't hurt so bad . I 'll be fine , its just part of the process . I hope someday I look back after I finish a full marathon and think , geez I was being a big baby after that half .

Answer:

They just ran a marathon .



Why may the narrator be sore in the coming days .