Push ups on a BOSU not only strengthen the chest and upper body but also help to increase stability.
Instructions
Begin with your hands placed in the middle of an upside down BOSU, thumbs of each hand as well as index fingers touching to create a triangle, arms straight holding up your weight, feet together and out-stretched behind, body straight.
Slowly lower yourself into a push-up position by bending your arms and keeping your body straight. Return to the straight arm position and repeat.