During daily life, our bodies work as a whole unit with multiple parts moving together to accomplish a task. While it can be helpful to identify weak areas and target them for strengthening, real functional movements like the ones you do every day are performed using the whole body at once.
Total body exercises are not only important but critical for translating strength work into real life activities. They are also a great way to target multiple large muscle groups at once, which can multiply the bone healthy benefits of an exercise and help the body accommodate resistance. No matter what your strengthening goals, be sure to incorporate total body movement patterns for mobility, strength and balance.