2.5 miles and Slim in 6

I ran this morning with my friend Kelly for about 2 miles and then I ran to my friend Lauras who is letting me borrow her Slim in 6 workout videos. The run was so nice. It was humid but we went at a light pace and it seemed over before it began. I then did the first day of Slim in 6 which was tougher than I expected. I'm not sure why but for some reason I always feel like I am really fit even though I am not. Well this video confirmed the real situation. It wasn't bad at first but then I couldn't get my breathing under control and when I was doing the squats and lunges my legs started shaking. Now for the kicker. The workout is only 25 minutes long. haha. Well gotta starts somewhere right?