As you age, all of your ligaments and tendons become more susceptible to injury. This is just a fact of life. Once you stop growing, you start degenerating; all you can control is the rate at which you degenerate.
One of the most effective ways to slow down the rate at which you experience degeneration is to regularly stretch your muscles and tendons. Stretching these tissues helps prevent scar tissue buildup and promotes healthy exchange of nutrients and waste products via steady blood circulation. Read more about How to Prevent and Treat Achilles Tendonitis