Walk into any serious gym before a heavy session and you will see someone working a quad or a lat over a foam roller. It feels productive, it feels like preparation, and it is almost universally assumed to "release" something. The research tells a more interesting story: rolling does change how a muscle feels and moves, but probably not for the reasons most lifters think, and its effect on the force you can produce afterwards is close to zero. Why this matters Warm-up time is