get fit
v. phr.— «Freeze had called a running play, around the right end, away from Michael’s side. Michael’s job was simply to take the defender who had been jabbering at him and wall him off. Just keep him away from the ball carrier. Instead, he had fired off the line of scrimmage and gotten fit—which is to say, gotten his hands inside the defender’s shoulder pads—and then lifted the Munford player off the ground.» —“For N.F.L., Crowd Noise Has Become a Headache” by John Branch New York Times Sept. 24, 2006. (source: Double-Tongued Dictionary)