The main issues we see with most common sprain/strains whether they be the ankle, foot, knee, hand, wrist, shoulder or the low back, is the irregular formation of scar tissue. When the original tissues were literally ripped apart they are typically rebuilt with patch work type tissues called Fibrotic or scar tissue.
The more chronic or longer standing the issue, the higher the likelihood of irregular scar tissue formation. This means less motion or more dysfunction in the tissues.
The sooner we can get to working on an injured area the more we can teach the scar tissue to rebuild like healthy tissue as opposed to the patch job. This allows the "injured" area to repair more like the original tissue, providing more strength and stability in that area for the long term.