There seems to be two very different schools of thought when it comes to pre run stretching. The old school way I was taught back in the 1980's as a cross country runner was to spend a good 10-15 minutes doing static stretches before running at all. The new school of thought is that static stretches should be avoided before running. I have been using the new school of thought if for no other reason than I am lazy and/or always pressed for a time when I can run and not spending 15 minutes stretching is good for that. However, it seems like I get a lot of nagging injuries as I start to increase my mileage. A little tendonitis here, a pulled calf muscle there, etc. Now I am wondering if the new school way of doing things is right. I always start with a five minute brisk walk before running but maybe that isn't enough. Just curious what some of the experienced runners here are doing pre-run. I am 43 and nothing is loose anymore when it comes to my legs it seems.