US Sumo Champion Dan Kalbfleisch teams up with Stephen Kramer Glickman of Big Time Rush for some zany fitness fun, proving a great workout can come in all shapes and sizes.

In this week's fitness challenge, hit the gym with Eric the Trainer and his crew - pump up your muscles and your brain! Then be sure to visit www.csweat.com for more fitness tips and to download complete workout episodes featuring many of your favorite celebs and athletes.