My advice would be to start your run very slowly and warm up gently, use this as the opportunity to warm your muscles, joints and tendons.
My neighbours were suprised that the guy who they see jogging slowly down the road every day then jogging slowly back again an hour later was in the local paper! The real training is done in the middle.
There is evidence that stretching before runs actually increases the chance of injury and their is little evidence that post run stretching helps either! However I would recommend the latter.
Seb Coe claimed his (extensive and thorough) stretching program added 1 inch per lap! Who am I to argue with that! however many top long distance runners do very little if any stretching.
In my experience if you do a specific stretch for example the ITB or lower back stretches then you will see benefit.