Check them out! And be sure to search our videos ANYTIME you're curious about exercises that focus on particular body parts.
You should also check out the Workout Builder/Exercise demos (both found under TOOLS up there ^^ in the top navigation), b/c you can search for new exercises there as well. The Workout Builder has really handy categories to search through, like Core, Upper, Lower, etc. You can select exercises that use dumbbells, an exercise ball or no equipment at all! Great resources!