Read the following context and choose the best option to answer the question.
Context: i think i exhausted myself with that baguio climb and long run . i lost i think three kilos in over a week and it 's not nice . i 'll find time later . i 'll be out on the track later .
Question: Why might the narrator have exhausted themselves ?
Options: 
- They are not physically capable of working out .
 - They have been working out too much in an effort to lose weight .
 - They have n't been taking in the correct amount of calories .
 - None of the above choices .


They have been working out too much in an effort to lose weight .