When Should I Stretch?

"I'm so confused, when should I stretch? Before a workout, in the middle of a workout, after a workout?" 

Is flexibility a main goal for you? Do it in the beginning before anything else. Yes, prior to doing anything! No warm- up. Just stretch. 

I was always taught in college that you should warm up prior to stretching. My professors would always say that more blood flow would go to the muscle and the muscle will warm up reducing the likelihood of injury. Yes, that's true however, your flexibility is not going to improve dramatically.

I have found that PNF stretching prior to anything has yielded the most significant results. When you stretch a cold muscle you actually change the length of the muscle and connective tissue. This is important because those improvements in muscle length are due to actual increases in the length of the muscle and tissue and are not due to the temperature of the muscle or warming up.