Interval Class

I started something new at the gym last week. It is called an interval class. It is a group led class that uses hand weights and floor mats. Our instructor leads us through various leg lifts and chest presses, etc.

My question is, how to I track something like that here? I would conciser it a strength class, but entering strength exercises here is more "weight and rep" driven.

I use my heart rate monitor and burn about 400 calories, so for now, I'm entering it as a cardio class.

-Dave