Legs Slim and Tone

I am not positive of the name of this workout, but it's a ten minute Pilates leg workout and my LORD.  Pilates is hard, and every time I do it, I think WOW, I am never doing this again!  I told my sister, it seems like you're not doing anything - like WHY would it be so hard to make a circle with my leg?  But it is.  It burns the hell out of my legs.  It's a great, positive, workout, I like the trainer but am too distracted to remember her name.  She has red hair and ... great legs, ha!  It was my third short workout today and it was plenty.