WHITE SULPHUR SPRINGS, W.Va. — John Harbaugh ran the most grueling Giants practice in recent memory Thursday in the West Virginia humidity. And you need to be in pads to really assess football players. The players actually are doing a pretty good job of thudding each other without crossing the line. The defensive line and linebackers won the battle with the offensive line on Thursday, but it’s all with an eye on strengthening both sides of the ball. Of a Harbaugh football team in New York.