Re: Pretty disappointed in myself, looking to fix that.
If you're looking for a workout, maybe you just didn't visit on the right day. My dojo has several classes a week that are oriented towards beginner and intermediate levels, but Wednesday night is advanced class. I went to uke for the yudansha one night and I was entirely winded by the end of the hour and a half class. I have to agree with Carrie, if you learn to fall really well you can get a great cardio workout simply by being uke for the more experienced belts. Getting up really wears you down!