BOSU training stands for Both Sides Utilized, which means you can challenge yourself with numerous exercises on either side. Introduced to the fitness stage back in 2000, you've probably tripped over a BOSU ball in the gym by now. Let's take a look at the fitness power offered by this rubber, gel-filled half-dome perched upon a slab of molded plastic.

Countless moves targeting the glutes, hips, thighs, core and upper body can be performed ball-side-up, requiring focus because your balance will be challenged. BOSU is a functional training tool that stabilizes your core and improves your balance.

Your BOSU ball can also work as a weight bench. Just kneel on your BOSU for those one-armed rows or sit on top for incredible abs. That extra BOSU wobble works your body in new ways, putting sturdy floors to shame. Flip the BOSU over, grab the plastic handles and you're ready for a variety of strength exercises -- push-ups, planks and tilts. Even contestants over at "The Biggest Loser" have used the BOSU.

If you've got a BOSU on your holiday list, the BOSU Home Trainer system will cost you around $100. Or you could go with a BOSU Sport Balance Trainer costing anywhere from $60-$100, based on 45/55/65 cm sizes.

If you're interested in other great, low-cost ways to lose weight and love your body check out That's Fit's yoga section.