chances are you were in a good and balanced mood to begin with, because you didn't have to rush and take a quicker alternative.

I used to run part of the way to school because I was notoriously late. At the end of the year I aced the gym class mile run, but overall my unreliability caused much concern in other topics. I maintained for a time that exercise is vital for a healthy mind, but because I didn't exercise on purpose, I couldn't take advantage of it.