Exercise becoming reduced

It's really rather hard to get cardio in on Tuesday and Thursday with such a full schedule. Ironically, this is because my 8-9 o'clock hour (roughly) is taken up by my P.E. class, yoga. On Thursday, I don't have enough free time after that until 4-6pm, when I want to study with physics buddies on the Friday homework set. On Tuesday, I was ellipticizing the hour afterward, but now I have to give that up in order to tutor someone. So I'll just have to make do with my yoga for exercise those days and continue doing cardio and pull-ups MWF. I can't wait until next year when I've lost this weight, built up my arm strength and earned my P.E. credit. I'll have so many more options for when and how to exercise.