Add a few dumbbell curls for an added challenge, or just stick to the lower half. (health.com)
Well, you can't go wrong by initially grabbing a few dumbbells (or kettlebells). (brandonricheyfitness.com)
Here are the free fitness videos we found most useful (Warning: most of these videos are going to require quite a few dumbbells, if not an entire gym). (tctmed.com)