An Integrated System (Your Body) is ONLY as good as your isolated parts it's made up of (Your muscles, joints, etc.).

You can't keep driving your car hoping that whatever problem it's having will go away on its own. Race car drivers have strategic pit stops otherwise they'd had no car to finish the race.

Performing integrated/"functional" training to fix your weak links!

This will only magnify your muscle system's imbalance. Assessing and managing these weak links requires highly detailed isolated resistance training. 

Where are you having low quality muscle contraction?

No Pills.  No stretching.  No medication.  No Massage.  No Surgery.  No Adjustments.  No therapy.