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

Context: seriously i walked 5 - 6 hours almost non - stop . few quick terraces - stop .. i even got to feel a muscle in my inside tigh that i never felt before even after running training.i went to place i never get to see anymore . happy places sad places .. in fact almost each place remember me sad and happy memories . montreal make me sad often .. my friend maurice is always like:'you and matt need to come live here!yay ! "

Answer:

The narrator is upping their training and running .



Why is the narrator feeling some pain in their legs ?