Circuits

I was reading the Circuits post on Kurt's Blog, and I realized that I have a really hard time with circuits. It sounds like Kurt's coaches do a good job working the team hard, but personally I have trouble with these workouts. I have a mindset that if I'm doing anything with resistance, it has to be HARD. I feel so unmotivated doing resistance work if I'm not doing it to build muscle. I really need to do some research on exactly how circuit training benefits the body. If I fully understand their benefits, I'm sure I'll be motivated in completing them.