To change the filter on this type of refrigerator, gently slide the unit out, unplug the unit from power, turn off the water valve, remove and replace the water filter, turn water valve back on, check for leaks, plug refrigerator back into the power outlet, slide unit back in place, and you are done.
Although very simple, balance exercises can greatly strengthen your center of gravity. Any exercise that is done on one leg can be considered a balance exercise. Standing on one leg will improve your body's ability to center its mass over one leg.
Standing posture relies on dynamic rather than static balance. The human center of mass is in front of the ankle, and unlike in tetrapods, the base of support is narrow, consisting of only two feet. A static pose would cause humans to fall forward onto the face.