You can't believe PT students stretch before running? Stretching can alter the length tension relationship and affect performance negatively if your goal is maximal power output, and research is somewhat inconclusive on stretching however many studies do not show a lower incidence of injury with stretching, but it depends on how far you are running, what you are running on, how fast you are running...That is a really general statement and I think PTs need to avoid making those general statements as it can corner us into stereotypes rather easily. A dynamic warm-up has been shown to increase performance and more effective then static stretching, but there are manyyyy times of stretching. Static, PNF, Dynamic, ballistic, etc. I would be careful about making blanket statements as those especially during clinicals and practicals. My professors would always call us out on those types of things. Just a heads up and thought it was important to point that out.