I am yet to see scientific evidence that says those who run regularly suffer knee complications at a higher rate than those who don’t run. This means you can continue with your morning jog without worrying that you are wearing out your ligaments.
However, guard against overextertion. The trick is to begin your run slowly and give yourself rests in between. Driving yourself too hard may lead to injuries such as knee ligament tears.
As a precaution, get running shoes that adequatly absorb the impact of your feet hitting the ground. without proper foot support, you are only setting yourself up for knee problems.