If you have lots of old, useless and  unwanted CDs just lying around, here is a best to re-use it. The Health Green Up CD Dumbbells concept from designer Seung-il Kim is a excellent way to recycle while shaping up your physique at the same time.

The dumbbells are basically plastic handles with attachable CD cases. Each CD adds 15 grams to the weight of the dumbbell setup.

When the CDs are put into the cases and then attached to the handles, some reasonably heavy dumbbells can result.  Not too heavy, but they’re probably great for keeping your blood pumping while you’re slaving away in the office.