This constant engagement strengthens and tones your core, including your abs, obliques, and lower back. Additionally, Bosu ball exercises often involve movements that require your core muscles to ...

(More on that in a sec.) ICYDK, Bosu is short for 'both sides up,' which pretty much sums up how it's used. In other words, you can turn a Bosu ball to either side and still get a killer workout on ...