Read the following article and answer the question.

I just joined Planet Fitness , so now I will feel better and not have to subject myself to Dave Harrington 's militant karate workouts so much . I ' m tired of that man . Now I just need a Zune . How to let Christopher know that I 'd much rather have one of those than a new guitar for my birthday?I will be 23 in two months exactly .

Why may the narrator be looking much better these days ?
They have worked out .