However , I lost a lot of weight quickly ( even though I do n't weigh myself on a regular basis , I could tell from my clothing ) and after about a week , running started to feel hard .
At first , I felt fine .
I lost a lot of weight quickly ( even though I do n't weigh myself on a regular basis , I could tell from my clothing ) and after about a week , running started to feel hard .
At first , I felt fine .