"Look for a leaner and smarter Marion Barber next season.The Dallas Cowboys running back has lost 10 pounds and is taking advice on how to pick and choose when to use his barbaric running style.Running backs coach Skip Peete said it should make Barber quicker, more durable and more productive."He has lost a noticeable 10 pounds," Peete said. "He is quicker now than he was last year at this time. He still has the ability to run with power. He has worked extremely hard this off-season."At age 27, Barber is not considered old. But his body has taken a pounding over the last few years because of his workload and running style.It is likely the reason behind some of the injuries he has had the last two years.Peete said it's only natural for him to think of a smarter way of doing things when the opportunities exist. If that means running out of bounds rather than running over a guy for 1 yard, then that's what he should do. And the Cowboys have used video from last season to illustrate the point."We talk to Marion all the time," Peete said. "'You probably didn't need to take that hit. It would be been smart to get down. You are not going anywhere with one guy on your ankle. Be smart.'"