I get worried when I see too many exclamation points in research reviews on blogs. Thank goodness for the Poliquin Pendulum, as the debate on foam rollers is ironically more centered with his citing of the Sacred Heart study. I am a proponent of foam rolling after training because very little research I know shows that dynamic warm-ups decrease power or speed. Some people may stretch, I like to skip. Some like to roll, I like to run. Some like to activate, I prefer to potentiate. Taste or preference? Maybe. Results? Choose wisely. I think a few stretches and light treatment of a muscle may help, but if something is not ready take a day off, go lighter, or adjust the program. Like crunches, people are resistant to change, and the research can be found here.