Foam rollers have a place in the training environment. That being said in most situations they have a very small place. Just like any other training tool they can be overused. In my understanding they are a form of self myofascial release. I have found the roller especially effective for use on the IT Band and the serratus. As far as I am concerned the foam roller is best used in cooldown, not warm-up. I want to see active dynamic activities that activate in the warm-up, not passive static activities. In short if you are spending more two to three minutes at a time using rollers I think you should rethink what you are doing and what your training objectives are.If you work in situations like I do where time is an issue, you must use the training time wisely. I think foam roller work can be a good "homework" for an athlete who has particular issues that need to be addressed.