A couple of years ago, I noticed how everyone became obsessed with using kettle bells for weight training. I wondered what was so special about a medicine ball with a handle... But now I love them. I don't really know why, but it's not as gruesome as using free weights. I guess because you can do more fun exercises that incorporate your full range of motion with them. Anyway, here's a circuit that I've been doing lately. The pictures make it look easy, but let me tell you... You will feel it the next day! Click the picture to find the workout on skinnymom.com. Start off with some moderate cardio (sprint intervals, a light jog, a brisk walk) and get to work!