Functional Strength exercises attempt to adapt or develop exercises that allow individuals to perform the activities of daily life more easily and without injury. In the context of body-building, functional training involves two main concepts:. 

weight-bearing activities targeted
at the core muscles of the abdomen
and lower back

resistance work that improves strength
in such a way as to directly enhance
one's performance of movements

Functional Fitness is an approach to training that can be used a little or a lot to increase strength, correct imbalances, improve movement quality, reduce the risk of injury in everyday life, and help you gain comfort and confidence in a variety of positions, without sacrificing aesthetics.